The rest is 1 1/2 pvc with 1 1/2 to 3/4 bushings with 2 to 3/4bushings on the end. Again these fit the aluminum rod perfectly with just a bit of filing. The rollers are held on by spring clips which allows me to remove the roller easily if necessary.
Basically you just stand the canoe up on its end ( this is the hard part and need help for that) and lean it against the roller. Climb up, grab the end and pull it up. The roller makes it pretty easy to pull up. I have some stainless steel tie downs that I mounted to the roof to tie the canoe down to. You can see them in the foreground of one of the pictures. There are four of them. Very secure when tied down.
1994 GulfStream Conquest 102 Limited Edition 26'
E-350 chassis with 460 EFI