Hellfire diffs replacement with LSP
 

I have a question:
Will these diffs work directly as a drop in replacement on my Hellfire? I've been reading and it seems so, I just want to make sure:
Hot Bodies Center Diff Hardened 50T Lightning - http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLGX1
Hot Bodies Front/Rear Diff Hardened Lightning - http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLGX0
of course, with 2 of these - Hot Bodies Bevel Gear Spiral 10T Lightning - http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXJBM3

If they do work as a drop in replacement (which I hope they do), do I still have to do the kyosho p6 o-rings mod? Do these leak like the stock Hellfire diffs?

Also, has anyone tried one of these? Ofna Torsen Differential Front/Rear 43T - http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMVX9 ? It's compatible with the LSP, so it should fit. But how would it feel? I want one in front and perhaps, if I like how the torsen works, I would try center+front. Wouldn't touch the rear with one of these as it would make the truggy inconsistent on bumpy tracks.