I just had a discussion post about a 029 super I tried fixing up for a buddy of mine, long story short he complained about having a badly tuned carb and I ended up finding a scored cylinder and an air leak in the crank, got it tuned up and running but basically told him that saw in running on borrowed time. My problem is that you can get a ready to go 029 for $200 any day of the week around here and for the parts and labor it's probably not worth repairing but the tinkerer in me really wants to do an 039 swap and a port job on it just because I can ,even though you could get a 026 pro that would still likely run and cut better for the same money and less work.