ORIGINAL: proptop
Bob...did you see the K&B .21 question in the glow engines forum?
There's a guy asking about wrist pin orientation...I told him that if it's like the 6.5 and 7.5 the teflon wear button goes toward the front...180* away from the exh. port...that is correct, isn't it? (I have 6.5's and a 7.5 but no 3.5's)
I don't recall... but clearly you couldnt use a teflon insert facing the port.
What locks in the aft side ? a clip? or a step ?