Doepfer

I'm totally digging the A-143-1. There are so many uses!
But what would be so awesome is if the AR/LFO "speed" could have
greater range. I'd love to be able to push the LFO into a much higher
audio range and slower LFO range. Is there a possible modification
that might allow this? I would be fine without a range switch, just
lower and higher values available. If I can't do it myself, I have
several tech friends in the area who would be able to help me out.
Any ideas would be appreciated.
Thanks