Fixing scratchy wah pot

[shawsofhell]

Hi I'm currently designing a replacement wah board to replace the shitty stock one. I have decided it will be best to put buffers at either end to make it as flexible as possible and to add controls for q and filter range etc. I also thought I might add a circuit similar to this http://www.geofex.com/Article_Folders/wahpedl/wah11.gif to ensure I don't have and problems with scratchiness. Does this sound like a good idea to you guys? If so how hard is it to build the ldr-led part of the circuit and how hard is it to 'tune' this corectly?