<html> Hi Dave,               I'm not sure about sudden changes, but I have noticed a problem with the way the front glide bolts have been set. I have seen them set far too high. A procedure that works for a stable key bed. 1. Back off the balance rail guides to be clear of the bed. 2. Adjust the FR glides from the centre working out ward. Using a 6" machinist rule (.020" approx) to check for frame to bed clearance.  Make sure that there is clearance at the rear of the front rail, if there is none the sharps my 'clack'. 3. Check the rear rail bedding. rarely a problem. 4. Adjust the balance rail glides.  I use a Jaras key leveller, and adjust the BR glides to the point that the plunger just starts to move, then back off a hair. 5. Knock test all bedding points and fine tune any adjustments. Finally check the tightness of the FR glides in the keybed. I have encountered a few that were too loose. They would want to turn just with playing. If loose. take them out completely, size the threaded hole with thin CA glue. let dry and reinstall.  These bolts need to be fairly tight, to prevent movement from heavy playing. Unfortunately, you now have to level and dip the keybed. Loosely fitting bolts will be you most likely cause. Winter dryness has likely made the problem show it's ugly head. I would like to know what you find, and will forward any imformation and try for changes. Regards Roger 06:36 AM 2/5/01 -0600, you wrote: <blockquote type=cite cite>A few days ago there was a question about a new Baldwin that suddenly had the regulation go south.  (Was that you Kent?)  I have the same thing here.  A Baldwin SF10 that was delivered here in July, now the dip is VERY shallow, checking way off, front rail is warped up off the bed, but not enough to have caused the tremendous lack of dip.  What's happening??? I've got to get this thing playing, but I hate to do major regulation on it if something is going to suddenly change again soon. HELP! dave </blockquote> </html>