Brand new to this forum; hello! I apologize if this has been addressed- I did a search and found nothing. I just bought a Spider IV75 on Craigslist and after getting it home discovered the presets knob is only working intermittently, and is loose in the cabinet. Has anyone here replaced this component, and how big of a headache is it? This isn't the worst thing in the world; I got the MKII shortboard as well for a pretty good deal so I can still deep edit with a pc (preferred anyway), but it would be nice to do it on the fly if needed. Thanks in advance!