on Fantom XA:
just figured out that you can't control the speed of the leslie effect when using it in perf mode with the mfx source set to prf.
My workaround: creating a new patch with the desired parameter set, set the mfx source to this part (eg prompt 'p1')- voila! Works with the identical fx parameters, the speed switch is controllable again. It's not a trick, it's a bug bug, eh? ;o)

A suggestion for the VK rotary effekt: the value of the 'Trans' parameter is lower for longer transitions and higher for shorter transitions. Vice versa would be more logical to me...

But also I want to mention that I like the quality of the effects very much: for instance a series of amp simulation and the rotary efx- stunning!

xcuse my english, btw