My only experience with robertson screws, was following a tech who installed them in such a manner that heads were damaged. Boy, that was fun. Grrr.... Barbara Richmond, RPT near Peoria, Illinois ----- Original Message ----- From: "Marcel Carey" <mcpianos at hotmail.com> To: "Pianotech List" <pianotech at ptg.org> Sent: Monday, January 21, 2008 8:57 AM Subject: RE: Chinese made Yamaha P22s - update > > Conrad, > > I never use the push pins to hold the dehumidifier. I find it MUCH easier > to use screws and a cordless drill. I use robertson screws with small > heads so the rod is held very efficiently. I always hated the push pins > AND screws supplied with dampp chaser systems. I just love robertson > screws for dampp chaser installs. > > Marcel Carey, RPT > Sherbrooke, QC > -- >> >> I find that they are NOT Dampp-Chaser friendly. >> >> You CANNOT push the dehumidifier rod holding (push)-pins into the side >> of the case. You cannot HAMMER the pins into the case. (Bending or >> breaking the pins are the only possible results with those methods.) You >> must pre-drill the holes. (I happened to have a #57 bit which seemed to >> work OK) >> >> Why? Because the core of the panels is no longer wood. It is a small >> amount of fiber holding a large amount of glue together. (Did Yamaha buy >> Kimball methods?) >> >> OK, OK, so they've gone to a heavier piano and I've dealt with it, but >> after I'd finished the install (I thought) and went to put the lower >> panel back on, I found that there is not enough clearance for the fill >> tube between the panel and the bottom of the keybed. Some carving of the >> underside of the keybed will be necessary to give it room. >> >> Happy Monday... ;-{ >> >> -- >> Conrad Hoffsommer, RPT - Keyboard Technician >> Luther College, 700 College Dr., Decorah, Iowa 52101-1045 >> 1-(563)-387-1204 // Fax 1-(563)-387-1076 > > _________________________________________________________________ >
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