Go for it Glen!!! I don't think any one is using one on the battlefield.
I'm sure it can be done. Me and Hulu were able to squeeze the SLU in Panzer IIIs, I'm sure it will fit. For the 3:1's I think you just need to get the right size drive shaft. Maybe email Matomart to see what they recommend.
HL Panzer III | HL Tiger | HL Jagdpanther | HL Panther | Mato Sherman
Hooben Elefant | HL Pershing | HL Bergepanzer IV | Tamiya Leopard 1A | WSN T-34
HL "Golden" Pan-Tiger | M16 Halftrack | HL Panzer IV | Tamiya KV-1 | Tamiya Tiger