I have a Mesa 290, which has deep, half-drive, and modern modes that are activated via jacks that take any regular patch cables connected to a switching device. The 290 manual suggests the 290 should be paired with a Triaxis, which has interface jacks specifically for mode-switching purposes. I don't have a Triaxis. I have a rackmount MIDI channel switcher, but it offers limits channels and it seems to me like a waste to use some of them up just to switch in and out modes on the 290. So, apart from having a Triaxis or using-up a rack switcher's channels, what's a good solution to switch in and out the power amp's modes?