I recently acquired a SuperCharger from DarkLord and after quite a bit of tinkering, it seems to be working fairly well with my TT030. Initially the unit only seemed to work for a few minutes before locking up. Also, whenever I tried to load any programs that used CGA graphics it would freeze immediately.
I took the unit apart and have reseated all of the socket chips a couple of times and now it seems much more stable. Under normal DOS activity it has not locked up at all now. Running CGA games still seems to lock up the SuperCharger occasionally, but it is certainly usable now.
I installed DOS 4 on an external SCSI and it boots surprisingly quickly. Very neat product.