I use double sided tape around the outside edges of the piece to be cut, but I apply coloured masking tape to each piece of wood first, otherwise I have huge problems removing the sticky from the double sided tape :roll: if the stack seems a bit wobbly I will use clear tape all around for extra security. I have occasionally used the wee pins from my staple gun, but less fond of that method as they have to be long enough to hold and short enough not to go through the bottom
A wee tip, if you sand and maybe give a light coat of finish/sanding sealer to the plywood you are less likely to find little fibres lifting when you remove the tape and the pattern
Gill