KingJD - there is a plethora of information on wheels, brakes and brake cylinders on this forum that discuss all kinds of combinations and permutations which would be worthwhile searching and reading. You might end up with more questions, but I suggest you go through that exercise first - you'll probably find what you are looking for. Bottom line though, do the brakes hold you stationary on the ground under a power check, and do they stop you on landing without putting the fear into you? Did the airplane pass an annual with the current setup? If so, I suggest you don't fix what ain't broke.