Originally Posted by
portyansky
Ball diff is a must, but im sure you have it built by now. You will notice a huge difference. I couldnt believe the difference.
A gear diff with an extra shim on each side will work very well. I haven't tried the M05 ball diff so am only referring to a M03. In fact the USA TCS Mini Champ for 2009 was using this diff in his M03.
I have a M05 ball diff sitting on my bench right now and will test it in a couple of weeks. The gear diff in my M05 worked great, but being able to adjust the diff externally is a great convenience.