<HTML>In a message dated 2/3/02 3:31:30 PM Eastern Standard Time, JWyatt1492@AOL.COM writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">There are two of these actions</BLOCKQUOTE> I've run across three variations in the backchecks on these actions.  Two used a bushed center pin and had an adjusting screw acting against a stiff spring (one type used a coil spring, the other a piece of clock spring).  Both had a chronic problem with splitting the bushed holes out of the hammer butt; the third (probably a later version) avoided the splitting problem by attaching the backcheck to a sturdy bendable wire.  ...thereby losing the convenience of the screw adjustment. Bill Maxim Maxim Piano Service 212 Newpark Place Columbia, SC 29212-8666 (803) 732-9225, FAX (803) 732-2641 wmaxim@aol.com</HTML>