BlackJag

I ended up replacing the 100k pot with a 10k one and it fixed the problem - the 100k resistance was too big for Helix to handle.

The pots have 3 pins and TS plugs have two - the TS cable needs to be connected with the middle pin on the pot and one of the side pins. Depends on which side pin you connect you'll get - - 0 resistance at heel down and max (10k) at toe down - 0 resistance at toe down and max (10k) at heel down It doesn't really matter which way round you connect it as you can "invert" your expression pedal in helix

Any pedal will work with Helix as long as its pot is directly connected to the socket. 10k linear pots work best - this is what Mission Engineering pedals have. You could buy a used Dunlop and replace the pot inside it - Dunlop pedals are all metal bullet proof design, you get the same (or better) quality as ME for one third of the price.

I've got two 2 custom pedals made out of Dunlop Wah and High Gain. The pots in both have been replaced (with linear ones) and connected straight into the sockets. One is working perfectly fine but the other one seems to have a logarithmic response (both pots are linear). I get 85% position when the pedal is only half way down. I measured the resistance and the readings are correct as in, the resistance response to the pedal position is linear (50% at half way down etc). The curve is set to linear and I also tried different EXP1 inputs - made no difference. The only difference is the POT on the working one is 10k whereas the one in the "broken" one is 100k. I suspect the resistance might be too big for Helix to handle but the outcome is a bit odd to say the least. Does anybody here have any experience with custom pedals and Helix?