Well put the resin disc upside down on a stack of old newspapers
(a piece of wood would work as well), then the sponge pad upside
down on top of that, and finally the backing plate on top of that.
Made sure everything was centered and using a drill, with a half
inch drill bit, drilled through the hole in the backing plate and
into the sponge pad and resin disc. Didn't press to hard. Last thing
you want to do is drill into the kitchen counter. LOL!
Nice clean hole. Worked a lot better than fiddling with an exacto
knife trying to cut clean holes. No end of grief doing that.
Put the backing plate on the Ameritool, and placed the sponge pad
on top and bolted it down. Then lifting up the pad put some feathering
adhesive around all the sides and pressed it down. So far, so good.
Removed the bolt and washer and placed the resin disc on top and
bolted it down. Turned on the lap and spins true. The resin disc lifts
up a bit on the edges but that's because my disc wasn't exactly flat.
No slippage AFAIKS.
Placed it under a couple of phone books and will leave it overnight
to flatten it out a bit.
Looks like it will work fine only having to use one backing plate and
switching out the resin discs as needed.
Will report back if any problems arise.
James