Farmall Cub

I have done more looking at my Mott. The orig sales brochure which came with my tractor had model D9 marked. It looks like a D9, but when I bought a drive belt, mine only took a 120, not a 144 inch. Also mine is mounted centrally, not offset.
I have looked closer at the pictures and found out why. My mower has a shaft w/ a pulley on each end mounted on the left side of the mower, near the back. The drive belt goes to the pulley near the center, then another belt goes from the outer pulley down to the cutter shaft. Has anyone seen this arrangement before?
This allows the mower to be mounted centrally, and it does not extend beyond the tires.

Also, I am looking for a good used roller (with mounting brackets) if anyone has a source.

I've seen that shaft arrengement on a rear mount, but not on a belly mount.

Last winter I found a Mott mower in a salvage yard for my Quick Hitch Cub powered by the PTO. When I got it home the roller wouldn't turn. I purchased new bearings for the roller ftom the local IH dealer. I had to torch out the old bearings, and then found one of the bearing bores was pounded out .040". Using my 4" grinder I removed the weld holding the bearing bushing in the end of the roller, using my metal lathe I turned a new bushing and welded it in the roller. Everything worked great. New rollers can be purchased, but veery expensive.
Capt. Paul