The KT came back from the factory with a new slide, polished feed ramp and some new internals. Feeds even the WWB target ammo without problems.
I now have a BU in the KT.
I do need to drift the rear sight on the BT a bit to the right. The adjustable is all the way to the right, however the rounds hit left about 6" (confirmed with a bore sight laser).
Do love the BT.