Nice work on the repairs. I have 2 Cub Supers, a 2182 and a 1782. The things you repaired are pretty much standard to do especially at high hours. One thing you may want to take a look at adding to the trans is a SGT brace made by Xtreme Cub Cadet Parts and Accessories
It will stop the bolts in the rear from breaking and it will stiffen the frame. BTDT.
Thanks very much for the information. Checking on availability of part# CC-99-001 at this time.