As far as I've been able to tell, nothing since KBMiner 1.2.2 actually works with Grin? I was looking to see what improvements might have been out there for 4GB AMD cards, but it seems like that's it, excluding lolminer somehow doing the c31 algo on them. did kbminer actually drop support for c29 or did it just change something making it incompatible with old configs?