2M, What a guy! Once, again, you've given me very useful info on how to get it right. You've got all our backs. I've read the whole thread and am also impressed with your ability to make what you need. Marlin grew up with a machine shop in his basement. His Dad was a machinist. Marlin was beefing up Aurora model motoring cars when he was 15. His Dad made me a tapered, splined shaft for a side console that I built for my Duranautic Fishing boat for a bottle of Dry Sac. I've got my dimentions from #16 and will take it as advisement. Thank you!