I just treated myself to a Fiskars circle cutter (Merry Xmas to me, on clearance at the local art store) with the aim of, among other things, doing some markers for various games, including dials to mark Shock in Mud & Blood.
I thought about sourcing some Clix bases - I'm sure some of my packrat gamer friends have spares stashed away - but the circle cutter will also be useful for other scenery projects and such.