I had a very nice laminated countertop in my ex-darkroom (recycled into a reloading den).
I bought a 24"X10"X3/16" steel plate in a metal scrap yard and had them put a 90 deg. bend at 1 1/2" from the long side. Then I drilled 1/16" pilot holes corresponding to all my presses and accessories setups in it and had bolts welded on the underside.
Before welding, I had pre-drilled all the bolts' locations with a 1/16" centering hole, clamped the plate to the countertop in its final position and drilled through with a 1/16" drill bit. I then used a 1/2" Forstner dowel hole drill to form the recesses for the boltheads.
After that, the plate was drilled for the bolt holes and drilled and countersunk for 1 1/2" wood screws at 4" intervals on three edges and four horizontal locating screwholes on the front edge.
Once the boltheads were tacked in place, I clamped and screwed the plate to the countertop by first drilling on the front edge and screwing the four locating screws then going all around and pre-drilling the screw holes. I put a drop of white glue in each hole so the contact with the particle wood inside stays tight.
This gives a
very ridgid mounting point for the presses and I experience absolutely zero deflexion while resizing. And mounting/dismounting a setup is a breeze!
Cost: about $5.00 for the plate and $7.00 for the bending (minimum charge).
Tackwelding with a MIG was done by a friend, which gave me the occasion to
bolt my presses in place to ensure the bolts didn't shift position ever so slightly...
PP.