You posted this in the Spider V forum which is a TOTALLY different animal than Spider III. So you may want to post this in the Legacy-Spider forum. That being said, I did have a Spider III head long ago, but I never remember having anything close to that issue so I am little help to you on the front. I know I sound like a broken record, but the biggest mistake Line 6 ever made in creating the Spider V was calling it "Spider" at all. Everyone just assumes Spider V is an evolutionary change from III/IV with some additional features, functionality and presets. But -- in reality -- the functionality of Spider V is lightyears away from Spider III & IV. Spider V is a lot closer to being a Helix than it is being a Spider III/IV+. Spider V is kinda like a "baby Helix", if you will. My point is that you should consider upgrading to a Spider V. Personally, I prefer the head driving non-Line-6 cabinets over the combos FWIW. I really liked my Spider III head a lot and got great tone out of it, but the improved functionality of Spider V makes the Spider III look neanderthal in comparison. It is not just the orders-of-magnitude-better functionality improvement either as the tones are better too. When you start working in the Spider V world, you will just go "whoaaaaaa" with what it can do compared to Spider III. Just my two cents; sorry if this is no real help.