I installed my Torque-a-verter TAV2 on a Robin EX21 engine. I noticed the outert hub on the crank shaft only slides on a little less than a 1/2 inch. I could machine it down .70 and it would give me exactly 1/2 inch if I needed. How much is good or not good? This part is the part http://www.mfgsupply.com/m/c/200376A....html?id=GbGX4mTw that only slides on less than 1/2 inch.
