Got an idea the other day, and it's actually doing stuff.
When using Europa/Grain/any device really, we can create a create a "range slider" to use with the EDIT Y-POS function.
The LFO's and Envelopes have a max value of 50Hz, but you can go higher by using the mod matrix. Draw a straight line on Env1 with 4 points, also set it to 'bipolar' (2 outer on 0, 2 inner on any value (still on the outer sides of the drawable area))
Now in the mod matrix set Env1 Rate to LFO1/2/3 or Env2/3/4 Rate, on +100 amount.
Use the targeted LFO/Env to modulate something else (shape/modifier1/2 on europa for example)
Now when we enable the "Edit Y-Pos", we can use this as an amount slider for that LFO's rate.