-How well would a SNES-Counter Tester or a small SNES-tester work on a PAL-SNES with a converter?

-Would there be any point at all hooking these up to the PAL-SNES? I guess I wouldn't get correct readings from the software if these SNES-Testers were specifically designed for the U.S. SNES.

-What hardware did they use in Europe to test the PAL-SNESes, if not the U.S.hardware and if any?

Anyone?