I recently bought a 1930 Ampico B 5'8" Knabe.  It was completely
unrestored and in beautiful condition.  With a little work it plays
and reproduces beautifully.  I expect to restore it one day when I get
time but now I just want to enjoy it.

The soft pedal valve was leaky and when I went to remove it I found that
someone had lost the nuts and spring clamp (which is a backwards one),
so they glued the valve block in place.  I had to remove the loud pedal
block to get it out.  What size and threads are these nuts???  My thread
gauge doesn't have anything to fit it.  Does anyone supply these and the
spring clamps?

Also in the drawer there was a modification made to the Control Valve
Block.  My block is different than the one in the book.  It has a
separate nipple to feed the reroll valve "A"  on top.  The book shows
that valve is fed from the side from pedal suction along with the tracker
and music roll brake.  There is one more nipple on my Control Valve Block
than the one in the book.

The modification I found is that the nipple that is supposed to feed the
music roll brake was plugged and the brake was fed with a separate tube
from a tee at the pedal pressure test block.  I'm not sure this is an
original mod since this tube ran around the stack.

Question: has anyone seen this mod?  Does the pedal pressure tube tee and
connect to both nipples and feed the reroll valve "A" on the top and the
tracker pneumatic and music roll brake on the side?  Also what should the
gauge read on pump suction and pedal suction just before the rewind
perforation comes along?  I hope this makes sense to someone.

Randy Hayno