Fixing Warped Records
I have used the oven and plate glass technique several times. I think the trick is preheating the oven and turning it off prior to inserting the record sandwich. The records never get to 200 degrees.
One thing was insert only dry records into the oven. I cleaned a record with the VPI liquid once 11 years ago and there was a small amount of fluid on the record. Several washings would not remove the dried on VPI fluid residue. I now use the Disc Doctor fluid, but the used records in Houston must have fungus damage. Nothing will quiet the records that have been stored without AC!
BTW, I use the Merrill outer record clamp and a RS spindle clamp purchased 20 years ago for 4.95. The combination handles almost all the warps. The outer clamp also adds a bunch of rotational inertia. This does wonders for speed stability. Great Product.
George hoping to find time to build his Pearl soon