Lol..that's funny..I'm such a tweeb...I could only think or tire slime....ok well you've got me convinced.....ball diff is on the way....on another note...since I can't finish the diffs I went on to step 2 center gear adaptor....I bought aluminum adaptor and 19 t pulley...it doesn't include all the shims you need to finish the assembly...I need M12x0.85 shim and the shims aren't in bag 2 with the parts...crap...looks like a need a shopping list for the hobby store...grease for step one...shims for step three....thanks for the quick replies...TTS