the boxes are great, pretty well what russ has said about them is spot on, as we both know from experience. Dog rings wear like a mofo, but as said they can be cleaned up to be used again before having to replace them. Full set of dog rings is about 1k.
I finally got over the mental block in my head about changing with the clutch on upshifts. Fark its great, change so fast with just a slight lift off the throttle. Pull the lever easily and it just slots into the next gear, so long as the revs are high enough. I found in the lower revs if your changing without the clutch, you need to rev match with a blip so it slots in or else it will crunch also. Obviously rev matching on downshifts is a necessity and used in conjuction with the clutch.