can't remember how long the ports are, but so long as you don't go smaller than around 2.8mm it will flow OK... 3.0 is pretty much the min for a full 12 FP, but that's not what we are talking.
can't remember how long the ports are, but so long as you don't go smaller than around 2.8mm it will flow OK... 3.0 is pretty much the min for a full 12 FP, but that's not what we are talking.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.