Today I priced some 4 1/4" 6061 solid aluminum 12" long to make some rear wheel conversion kits. $174 for a foot plus cutting charge. WOW!! That would make 3 sprocket and 3 brake disc adaptors. $ 25.49 plus cutting charge for 1 5/8" round bar for the spacers and $ 13.40 plus cutting for 7/8X.125 wall aluminum tubing for the center bearing spacers. Then there`s bolts, bearings and my usual worthless (free) labor. That Cognito Moto rear hub is looking better all the time.