I did experiment a bit with various adhesive methods, including the CA/masking tape idea. It did work well enough for larger parts but I can hold such parts much better and simpler with a vac pod.
For smaller and intricate parts neither the double sided carpet tape not he masking tape held up well unless using really small bits like 1/16". The other thing that bothers me is that the bit often curls up snots of the tape adhesive when cutting through and that it is often a pain to remove adhesive residue from the surfaces (have not tried transfer tape, though).
After all, I use a variety of methods, gave up on the adhesive tape and still don't have a real good solution for very small parts (say <1 square inch) other than tabs.