Mason AA with Renner parts

[Mark Dierauf]

  After seeing the recent posts about the Mason CC with Renner USA parts, I am
prompted to ask a question regarding a Mason AA action that just recieved a new
set of the same parts.
  When I went through the initial regulation, I noticed that I had to adjust the
jacks back considerably from the scribed line on the rep lever window (IOW,
towards the drop screw). I didn't think too much about it then, as everything
seemed to regulate correctly, but I am finding it impossible to get good
checking, particularly in the bass. It now appears that after let-off the jacks
are getting wedged in between the knuckle and the repetition felt (jack stop
felt), and that this is keeping them from checking properly. I measured the
action spread (on note 1) and got 4 1/2". The drop screw is contacting the rep
lever way out on the very end, also indicating that the spread may be too wide.
Any ideas?

                  Mark Dierauf
                  Concord, NH

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