This is basically like Druid's design.  It's an Atmel chip programmed to interface 2 rotary sticks.  I haven't used it in forever since I upgraded to one of RandyT's GP-Wiz units that has it built in.  I assume it works, still (don't know why it wouldn't).  If anyone wants it, I'll give it to you if you cover shipping.
This unit includes 2 cables that attach directly to LS-30 (and Happ?) mechanical rotary sticks.