I am curious to how this works out too.
In my experience on rear end covers using RTV, is that once it fully cures, you could probably take the bolts out and it would never leak.
On Cubs you still need the bottom ones for the drawbar tho.
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Travis
1993 Cub Cadet 2064
1988 Cub Cadet 2072
1980 IH Cub Cadet 782 w/CH20
1966 IH Cub Cadet 102 w/K301
1961 IH Cub Cadet O
1967 IH Cub Cadet 102 & 122
JD 2155 w/ 175 loader