Circitmage,

I seal all of the carbon parts. The top decks need sealed to prevent cutting the insulation of leads and power wires. The shock towers benefit from sealing as well. It makes them less likely to chip or splinter when you crash. Plus It just looks clean. I kept it simple and just sealed the outer edges. I didn't bother with the small cut-outs. I did sand them, though.

As far as I know the B44.1 comes with carbide diff balls, not ceramic, but I have a B44 so I wouldn't know for sure, I guess. Both AE and A-Main websites just indicate "Ball Diffs with lightweight outdrives".