Combining kits into a double pedal

I like the idea, though I have no clue how to answer your questions. Sorry.

 

Before the days of "the Bradshaw box," custom pedalboards were built exactly like you're describing. The player and builder discussed effects order and the builder took the guts from pedals and installed them into a custom enclosure.

Build it up and have the power connections for each pedal on flying leads so you can run a test to see whether parallelling the power supply will work nice and quietly. If it works fine, use one power jack and run four wires from it so the pedals are in parallel.

Consider an 'order' switch that allows you to flip the order of the effects in your signal chain. Several makers do this--such as the Wampler Dual Fusion. It's a cool option and does make a difference in how the efffects sound when both are engaged.

 

I’ve built a few double pedals. I use a 1590BB enclosure, but I don’t think that will physically work for most kit builds. You might be better off using a strip-board layout and wire your pots and switches off board.

 

Yes, it should work fine. You're probably OK with one power jack for both circuits, I've done it many times.

 

it works just fine and people do it all the time. mosey on over to a place like madbean's site and you'll see tons of examples in the build reports.

 

It's dirt simple to do, though I don't see any advantage whatsoever beyond saving a little space, two jacks, and one power connector. I'd rather be able to swap out one or the other pedals than to be stuck with the pair. But if you have two that you're really using frequently and long term, great. And it is a lot of fun to paint enclosures, really, though most people overdo this into something tacky and ugly. But if you have some visual judgment, outdoing the pedal companies visually is not hard.