Anyone ever put a 1770 tire contact drive transmission on a 7000 planter?

like the one in the top picture...
http://salesmanual.deere.com/sales/salesmanual/en_NA/seeding/2012/feature/drive_system/planters/me_half_width_disconnect.html

Kind of like doing a Jamison drive, but with guys taking all these transmissions off for other upgrades, might be able to do it a lot cheaper with a 1770 transmission.

Or would it just be simpler and just as cost effective to get some gently used hydraulic drives?