Refresh my memory... my Mark IV is at my rehearsal space, and I haven't seen it for 2 months (and it'll probably be another month before we can all get together for our next practice).
Doesn't the Mark IV have an XLR-type connector for the footswitch? How many pins does it have?
If you're lucky, and it has 3 pins, you may be able to use a standard XLR microphone cable to extend it. If it has more or less than 3 pins, you may need to build a custom extension cable, but I'm sure the connectors are out there somewhere.
--B
Doesn't the Mark IV have an XLR-type connector for the footswitch? How many pins does it have?
If you're lucky, and it has 3 pins, you may be able to use a standard XLR microphone cable to extend it. If it has more or less than 3 pins, you may need to build a custom extension cable, but I'm sure the connectors are out there somewhere.
--B