I built a rangemaster on vero board using the same transistor from small bear and the switch stuff is really easy. Get a dpdt (it's the kind with 6 lugs) on-on switch, and run the 2 center lugs to the 2 solder pads for the .0047 input cap. Then wire one cap to the outside 2 lugs and your other cap to the other 2 lugs. I would also get some alligator clip leads and play with several different cap values to find what works with your rig. I think I ended up using a .022 and a .01, but I tried a bunch of different caps until I got what I wanted.
This ended up being one of my favorite dirt pedals and I use it all the time.
Check this switch info for some clearer diagrams http://www.beavisaudio.com/techpages/switches/