Thats mighty lean on the main Bailey
NOZ and N1E are the same with NOZ being a half clip richer.. What clip you running the needle on?? I'm definately trying the N3EW after the head work, and may try the NOZI aswell.. So far N3CH #2 has been my best setup.
As for air filter access nothing is really perfect. The WR access through the side cover works well but can still leave doubt as to whether its located properly on the far side..
If you removed one of the side mount bolts and exchanged it for a quick release you might be able to tear the whole side off easy enough.