Aha! Yeah, I'm burning through my sandpaper supply like mad with this re-popped kit. :-) Kind of weird especially considering the plastic is so soft. Oh well.
The gear issue I'm encountering with the Kopro kit is that the locating holes for the nose gear are too far forward in the nose well, so the locating tabs for the gear assembly won't reach (if that makes any sense). I've cut the locating tabs off the nose gear assembly for now, so it shouldn't be an issue, but wondering if I did something wrong when attaching the nose gear wheel well to fuselage half.
As for the accuracy issue I mentioned, the nose gear has a front strut that's not visible on the real a/c, but is on the model. Not a huge deal, I guess, so debating whether or not the SAC gear is worth the cost.
I suppose I could also cut off that strut on the kit nose gear so it doesn't show......