Update on the LST diff modification. They are awsome, I disassembled the truck for some end of season maintenance and the diffs have no sign of leakage and run smooth as silk so I just cleaned the outside and put them back in the bulkheads. That's a whole spring/summer of racing and bashing on 4S with a few times having fun on 6S so they are very durable. An original idea from Lincpimp and I thank you for it.
I can't remember if I mentioned how I install them in the bulkheads now, I shave down some material on the aluminum cases of the diffs so that leaves the bulkheads intact except for a small portion that has to be Dremeled to accommodate for the front of the diffs where the two screws are. Here's a few pics, I hope they are self explanatory. This way of doing it coupled with the diff blocks really holds up to some serious abuse.
Based on your mods.
I took 1 step futher and did a machined version of the LST-revo diff mod... Removing the exact amount of material to fit and un modified Bulkhead (but the bolt part)