<HTML><BODY BGCOLOR="#ffffff">Salutations, I've got some regulation problems on a 50 inch Mason upright from the 70= s.  I've worked on other Aeolian uprights of that vintage, and some of = them have the same problem.   The initial problem was that the keys weren't bottoming out on punchings= .  It seems that it's been that way since new(though they bought it use= d).  There was a huge gap between the bottom of the key and the punchin= g when the key was depressed.  This led to hammers blocking, bobbling, = and a feel that could only be described as spongy.   At my last visit, I added punchings, and improved the feel somewhat, but= some of the bobbling is still there.  I also had to increase letoff di= stance in some areas of the keyboard an unacceptable amount to get it to wor= k without hammers blocking against strings. I think that the main problem is that the key height is too great. &nbsp= ;It was somewhere around 70mm, though I forgot to write it down.  More = precise measurements are necessary, and they will be forthcoming after my ne= xt visit there in January.  Blow distance is at 1 7/8(the only thing in= the piano that seems at spec...:-), but it doesn't seem to be enough. I tried lowering the key height on a few sample keys by removing balance= rail punchings, but there was nowhere near enough aftertouch.  Should = I try increasing blow distance to 2 inches or more?  Any ideas??? &nbsp= ;Haaalp??   Any input is welcome, Dave Stahl</HTML>