It is important to get the high quality slip ring (the KEYO uses gold contacts and silver tined wires) (They also make a 4A version though more expensive)

In a Tamiya tank with the Tam Leo electronics, never had an issue using the slip ring, the slip ring set in the speaker box hole has plenty clearance for gun elevation.

I actually have installed the slip ring in all my tanks, Pz4, Tiger, KT, Pershing and T55 all with no issues