Voodoo lab tremelo trim pots?

[LongFrost]

I am waiting on a VL tremelo to come in and am trying to find what the trim pots(if more than one or R any) adjust. I will be using it in conjunction with a really early stand alone Provibe to do leslie fake. Do stress fake. VL won't give d*ick for info so I'll try here.  I need to be able to adjust speed of VL trem to get close to top/bottom speeds of Provibe. The fake won't work if either end is to fast or to slow against/with Provibe.
If they aren't adjustable is there a mod to implant that will?
Has anyone attempted to add a FX jack to control speed with xpression pedal?
Has any one tried to mod for a switch between fast and slow speeds(slow to fast but adjustable with trim) as on unnamed other companie(s).
Anyone have a schematic?
Any help would be help.