Korg Poly-800 Moog Slayer Mod

Just saw this on the Vintage Synth Museum boards. It's a DIY mod for the Poly 800 that adds knobs and increases the range of the filter. From the site:
"This thing can do dangerous sounds, like the speaker-blowing (and ear-blowing!) sounds of old modular synths. It's really sick.... In addition to the usual disclaimers (if you break it, it's your problem, not mine!), I'd like to also point out that I will not be responsible for blown speakers, amps & ear-drums." Hard to beleive but it did score high marks from some who have tried it.

Update: I was trying to figure out what looked off about the picture below other than the mod. I didn't think the Poly 800 had volume and speed pots of the same design of the Polysix and I don't remember a tune pot, then I realized, duh, the picture is the EX-800, the Poly-800 desktop unit.