Hot bodies 1/8 diffs

[cmac]

OK. I just read another thread and some of the guys are running 100k, 300k, and even 500k diff oil in their slipper. They were trying to have it do wheelies at will also. I just bought 20k oil and I don't think i will use that. I bought 100k and 300k diff oil from A-Main, and I think I will start with the 300k and go from there. I also got a few opinions from one of my local hobby shops and (going back to one of the first few pages in this thread) I felt front diff gear mesh was not smooth enough, so I have a few pinions coming and hopefully one of them will be smoother. I have tried to shim it side to side and front to back and can't get it better. One other thing that the owner of the shop pointed out was that the hybrid bulks are not perfectly sealed. the seam down the middle has small "gaps" or "holes". First thought on that is to sand them flat on the bench grinder. Or do you think I could just seal them with clear silicone? they really are very small. I'm afraid that I might not get them perfectly flat and ruin them. Any feed back would be greatly appreciated.