sorry guys, the RG7620 switch may look like a standard 5 way switch from the outside, with two sets of 3 poles plus one common pole, but the connectivity of those poles when the switch is in the various positions is quite different from standard 5 way switches. *this switch is designed to give the decidedly non-standard coil cut options that the RG7620 has, including the neck HB in parallel. *without the wiring diagrams at my fingertips, i don't think it would give standard Strat type H/S/H switching.
you could use any standard Strat type 5 way to get standard 5 way switching, but i would recommend a Schaller Megaswitch (available at stewart macdonald
guitar shop supply). *the Original Megaswitch gives standard Strat combinations in all positions except the middle, where it gives the birdge coil of the birdge HB + the neck coil of the neck HB, for a telecaster like, phased sounding sound.
i like that tele sound so much that i put the yamaha 5 way switch in my RG7620s, to replace the both HBs position with the tele sound. *i've got coil cut diagrams on my website if anyone is interested in that.
http://www.people.virginia.edu/~sha3u/
good luck,
scott
sha3u@virginia.edu