Torx, use drivers. Rivet, use drill and punch.
if you need to drill out the rivets, but you want to put it back together when you're done, you can order 1/8" pivots/screws from knifekits.com
Hey does it work to try to revive a 7 year old thread?Question: Does anyone know if the pivot posts from a Micra will fit in the Squirt?