I've been over the moon with my 5F1 since I've built it a couple of months ago. It has a totally killer sound, but it's also very bassy and muddy, and I feel like I can't use some of my favorite fuzz pedals on it. Maybe it's just not an amp that can take pedals, but I figured I'd ask to see if I could do something about it. I typically run it at 10 (out of 12) and use my guitar volume to clean it up. Maybe if I could make a switchable mod to make it brighter, it could take pedals a little better, and have a little more of a Marshally sound? There are a few mods I am aware of, and I'm wondering what might be most effective. There's the bright-cap mod for the volume pot, but since I usually run the volume so high, I don't know if that'd be very effective - as far as I understand it, it doesn't add brightness in, it just prevents highs from being lost when the pot is dialed back. Another mod I could do might be to put the cathode bypass cap on a switch - currently I have a 22uF there. If I made that switchable out of the circuit, or to a higher value, would that be effective at reducing low-end/adding highs? I'm being choosy about which mod I do partly because I feel like everything is so cramped inside the amp as is. I'm not even sure where I can drill a hole in the chassis to put a switch. If there are suggestions for where a switch could go, I'm all ears.