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<DIV><FONT face=Arial> <FONT size=4>=
Jon</FONT></FONT></DIV>
<DIV><FONT face=Arial size=4> Interesting ideas. I've notice=
d that the cold hide glue tends to be more slippery than the tightbond. Its =
also probably more slippery than Hot hide because the Hot gels faster. Also =
the tight bond gets stickier right away which may eliminate this problem. I'=
m intrigued by the hot glue idea but the timing and speed of application mus=
t be done quick with out retarders, Right?</FONT></DIV>
<DIV><FONT face=Arial size=4> I May try pressing=
them next time with nothing or maybe just one pin in the middle of the long=
est rib. Or perhaps some sand. Good suggestions. What do you tooth the=
ribs with some sort of wheel with serrations on it?</FONT></DIV>
<DIV><FONT size=4> Thanks--Dale</FONT></DIV>
<DIV><FONT face=Arial><BR>> Also on a different subject ,o=
n occasion we've had the ribs scoot <BR>> sideways as we apply pressure (=
this happened with go bars to) so we <BR>> install short center pin=
s into the ribs glue surface to keep them from <BR>> skidding sideways wh=
en the pressures turned up.<BR>> Dale Erwin<BR>> &n=
bsp; Erwins Piano Restoration<BR><BR>Dale,<BR><BR>When I first got started w=
ith soundboard building I made some adjustable <BR>spacers to help keep the =
ribs straight. My friend from Steinway <BR>suggested this since this is how =
it is done at the factory with the air <BR>presses. In the middle of the boa=
rd they place spacer block to keep the <BR>ribs from bowing. I used these on=
my first couple of boards but found <BR>that they are just not needed. I ha=
ve built must all of my board without <BR>this aid with no problem what so e=
ver. I tooth the upper surfaces of the <BR>ribs and this seems to help keep =
them from slipping.<BR><BR>With your air press you may need to do something =
about this but the <BR>spacers will get in the way of cleaning the glue off =
and toothing may <BR>not do enough. I have used a few tricks with other wood=
working projects <BR>to keep things from slipping. Small brads can be used o=
r you can apply <BR>some sand to the middle of the rib. Sprinkle a few grain=
s on after you <BR>brush on the glue. I read in some old book about putting =
sand into hot <BR>hide glue to do this but I have never done this.<BR><BR><B=
R>John Hartman RPT</FONT></DIV></DIV>
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