I use aluminium cutoffs the mount the practice plates. Liberal smear with Superglue and go crazy. When finished, use a sharpened screw driver to take the plate off. Just position the screw driver at the side of the plate and a couple of raps with your hammer will pop the plate off. Have never had a plate hang up or bend.
Neo, that makes a lot of sense. I just googled shearing strength of super glue and found the following on Wikipedia:
"Cyanoacrylate glue has a low shearing strength, which has led to its use as a temporary adhesive in cases where the piece needs to be sheared off later."
From my experience whatever method will give you the most solid backing is best. At times I even solder stuff to a steel plate with low temp solder. That is not always necessary. Sometimes I just use carpet tape.
