First off, many gracias to The Dude for lending me his Lion X. As usual, it was a rat's nest, but I think we got a handle on the situation;
Of course, I just wasn't happy to have the two VCF's just sitting there, so a special expression pedal will be added to it. There's a "Local/Remote" switch on the unit, so you can use the unit without the pedal if so desired. You can select one or the other, or both filters. You can also set the voltage limit for each filter, as well as reverse the sweep of either or both filters. The expression pedal itself can turn the filters on or off too. Basically, it becomes a custom wah or tone control. It connects via a 9 pin mini DIN cable.
For the DIY crowd, don't despair, some boards will be available soon for sale. This version is the later Lion X, with twin BPF. The earlier version used a BPF, and an LPF.
There will also be boards coming soon for the PLL. These will be "all in one" boards, carrying drone, and interrupt functions all on the board. We have a Spacemen Saturn V board coming as well.