Wow...once again I'm perplexed. I had no idea so much could be involved with taking off and putting on this boats propellers. I know this sounds like I'm trying to be non confrontational but I think everyone has a point. Capt J has seen his share of real world "smallish" boat propped, most without disasters. Honestly I have no idea what matting tests, if any, will be done with my props. I will now ask just out of curiosity. I don't know what I'll do when/if they look at me blankly. It does make sense to determine proper fit of the prop to the shaft but in my boats case I think it will be ok without all the above posts proper process if its not normally done at this yard. Of course there is the chance I'm completely wrong skipping this step and the shaft snaps off prop and all! I may be better off to stop asking questions here and just live with my new toy in ignorant bliss! Thanks for all the info.