Rangemaster variable range control

[pryde]

Here is a pretty simple mod to do with the madbean rangemaster pcb to get a variable range control (instead of the 2 input cap toggle). Works great. Posted a recent build in the build reports section. I used a 1uf bass cap which may be overkill but found it very usable through most of the sweep. With the range pot full CCW, it is just using the 5n cap per the original rangemaster.