Hi Pete,
My Starfire II weighed in at 13# 7 oz with OS.91 power. It is currently in turbine conversion though. It had/has flaps and brakes and servo mixture control so it was at the heavier side. It flies like a lightweight even at that poundage! Mine is an early it, not the IIc so it had a bit less wing area too! You won't have any problem flying the II or IIc at 14 pounds, but test the sink rate without flap about half way through the fuel to see what to expect on landing. Then test with half flap pretty slowly... etc.

Len