Waterlogged: imho there is better chance if you'd ask about that by email Laing directly. I recall the case with D5 Vario pump mod, where Laing told him that way how/where to solder wire for Vario to report rpm tach signal like non vario does. Imho this pwm related question might be of similar kind, maybe you get lucky in similar way. If so, feel free to report us. PWM-ed 3.25 can interest many people (though imho might hurt sales of MCP35x ). Though then again, even with that D5 mod many people still buy varios with no intention to mod them, as soldering & loosing warranty is big no-no for most. So even if info for such mods gets public, imho it won't impact sales too noticeably (hint, Gabe ).