I would like to throw my 2 cents in for the resin molds. I have made dozens of molds from resin and if you treat the molds right, they last a long time.
I never tried the double sided tape trick, I just layed the bait in a Plano 3700, made sure it was flat and ready then mixed up a small batch of resin. I then glued the bait down with a few "strips" across, depending on the size of the bait, especially the head and tail. It also keeps the bait from floating up thru the resin. After to resin set, I could go back and finish the pour and the 3700 shapes the mold nicely. The marks from the "glue-down" barely show and no bass I've caught with my worms seemed to care.
The only thing I would do differently is pour a thicker mold. Most of mine were rarely over 1/2-5/8" thick. After a lot of heating, they curl a little.
If you want shiny worms, coat the mold with a little worm oil before you pour.
Good luck!