I'm looking to do a Simple transaxle swap/upgrade from the K46 to K57 for my L130. I've read all about the K66 upgrade and that'd be nice to do but I'm a Quadriplegic and I'm limited on my friends who are really mechanically inclined as they're busy, as they should be. I'm not looking to haul anything really heavy, just a simple upgrade and I like that the 57 has 3/4" shaft so I won't need to change wheels to 1". So with that I ask what Specific Model K57 will work with the L130 a K57R, K57K, K57AH, etc.?