diff --git a/pyRCV2/method/base_stv.py b/pyRCV2/method/base_stv.py
index 6b9fcc7..009176e 100644
--- a/pyRCV2/method/base_stv.py
+++ b/pyRCV2/method/base_stv.py
@@ -31,6 +31,8 @@ class BaseSTVCounter:
 	def __init__(self, election, options=None):
 		self.election = election
 		
+		self.cls_ballot_value = Num # Need to use Rational in unweighted inclusive Gregory
+		
 		# Default options
 		self.options = {
 			'prog_quota': False, # Progressively reducing quota?
@@ -60,9 +62,35 @@ class BaseSTVCounter:
 		"""
 		Public function:
 		Reset the count and perform the first step
-		Subclasses must override this function
 		"""
-		raise NotImplementedError('Method not implemented')
+		
+		# Distribute first preferences
+		for ballot in self.election.ballots:
+			__pragma__('opov')
+			candidate = next((c for c in ballot.preferences if self.candidates[c].state == CandidateState.HOPEFUL), None)
+			
+			if candidate is not None:
+				self.candidates[candidate].transfers += ballot.value
+				self.candidates[candidate].ballots.append((ballot, self.cls_ballot_value(ballot.value)))
+			else:
+				self.exhausted.transfers += ballot.value
+				self.exhausted.ballots.append((ballot, self.cls_ballot_value(ballot.value)))
+			__pragma__('noopov')
+		
+		self.quota = None
+		self.compute_quota()
+		self.elect_meeting_quota()
+		
+		__pragma__('opov')
+		return CountStepResult(
+			'First preferences',
+			self.candidates,
+			self.exhausted,
+			self.loss_fraction,
+			self.total + self.exhausted.votes + self.loss_fraction.votes,
+			self.quota
+		)
+		__pragma__('noopov')
 	
 	def step(self):
 		"""
@@ -295,35 +323,6 @@ class BaseWIGSTVCounter(BaseSTVCounter):
 	Basic weighted inclusive Gregory STV counter
 	"""
 	
-	def reset(self):
-		# Distribute first preferences
-		for ballot in self.election.ballots:
-			__pragma__('opov')
-			candidate = next((c for c in ballot.preferences if self.candidates[c].state == CandidateState.HOPEFUL), None)
-			
-			if candidate is not None:
-				self.candidates[candidate].transfers += ballot.value
-				self.candidates[candidate].ballots.append((ballot, ballot.value))
-			else:
-				self.exhausted.transfers += ballot.value
-				self.exhausted.ballots.append((ballot, ballot.value))
-			__pragma__('noopov')
-		
-		self.quota = None
-		self.compute_quota()
-		self.elect_meeting_quota()
-		
-		__pragma__('opov')
-		return CountStepResult(
-			'First preferences',
-			self.candidates,
-			self.exhausted,
-			self.loss_fraction,
-			self.total + self.exhausted.votes + self.loss_fraction.votes,
-			self.quota
-		)
-		__pragma__('noopov')
-	
 	def do_surplus(self, candidate_surplus, count_card, surplus):
 		for ballot, ballot_value in count_card.ballots:
 			__pragma__('opov')
@@ -357,34 +356,10 @@ class BaseUIGSTVCounter(BaseSTVCounter):
 	Basic unweighted inclusive Gregory STV counter
 	"""
 	
-	def reset(self):
-		# Distribute first preferences
-		for ballot in self.election.ballots:
-			__pragma__('opov')
-			candidate = next((c for c in ballot.preferences if self.candidates[c].state == CandidateState.HOPEFUL), None)
-			
-			if candidate is not None:
-				self.candidates[candidate].transfers += ballot.value
-				self.candidates[candidate].ballots.append((ballot, Rational(ballot.value.pp(0))))
-			else:
-				self.exhausted.transfers += ballot.value
-				self.exhausted.ballots.append((ballot, Rational(ballot.value.pp(0))))
-			__pragma__('noopov')
-		
-		self.quota = None
-		self.compute_quota()
-		self.elect_meeting_quota()
-		
-		__pragma__('opov')
-		return CountStepResult(
-			'First preferences',
-			self.candidates,
-			self.exhausted,
-			self.loss_fraction,
-			self.total + self.exhausted.votes + self.loss_fraction.votes,
-			self.quota
-		)
-		__pragma__('noopov')
+	def __init__(self, *args, **kwargs):
+		BaseSTVCounter.__init__(self, *args, **kwargs)
+		# Need to use Rational for ballot value internally, as Num may be set to integers only
+		self.cls_ballot_value = Rational
 	
 	def do_surplus(self, candidate_surplus, count_card, surplus):
 		# FIXME: Is it okay to use native int's here?
diff --git a/pyRCV2/numbers/fixed_js.py b/pyRCV2/numbers/fixed_js.py
index deec595..0ce24a6 100644
--- a/pyRCV2/numbers/fixed_js.py
+++ b/pyRCV2/numbers/fixed_js.py
@@ -25,7 +25,10 @@ class Fixed:
 	"""
 	
 	def __init__(self, val):
-		self.impl = Big(val)
+		if isinstance(val, Fixed):
+			self.impl = val.impl
+		else:
+			self.impl = Big(val)
 	
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""
diff --git a/pyRCV2/numbers/int_js.py b/pyRCV2/numbers/int_js.py
index 2571ae2..3815c0f 100644
--- a/pyRCV2/numbers/int_js.py
+++ b/pyRCV2/numbers/int_js.py
@@ -20,7 +20,10 @@ class NativeInt:
 	"""
 	
 	def __init__(self, val):
-		self.impl = Math.floor(parseFloat(val))
+		if isinstance(val, NativeInt):
+			self.impl = val.impl
+		else:
+			self.impl = Math.floor(parseFloat(val))
 	
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""
diff --git a/pyRCV2/numbers/native_js.py b/pyRCV2/numbers/native_js.py
index 48489b5..80f2d26 100644
--- a/pyRCV2/numbers/native_js.py
+++ b/pyRCV2/numbers/native_js.py
@@ -20,7 +20,10 @@ class Native:
 	"""
 	
 	def __init__(self, val):
-		self.impl = parseFloat(val)
+		if isinstance(val, Native):
+			self.impl = val.impl
+		else:
+			self.impl = parseFloat(val)
 	
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""
diff --git a/pyRCV2/numbers/rational_js.py b/pyRCV2/numbers/rational_js.py
index 10cc9b2..7883072 100644
--- a/pyRCV2/numbers/rational_js.py
+++ b/pyRCV2/numbers/rational_js.py
@@ -20,7 +20,10 @@ class Rational:
 	"""
 	
 	def __init__(self, val):
-		self.impl = bigRat(val)
+		if isinstance(val, Rational):
+			self.impl = val.impl
+		else:
+			self.impl = bigRat(val)
 	
 	def pp(self, dp):
 		"""