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Sounded best on 8 with a pot. Its fuzzy but not over the top.

whats your IC Tester?

I substituted the fuzz knob with 820 ohms resistor

Nah, too much smd parts for my bad eyes on the original. But I sent Robert some clear pics of the innards and a sketch of the Elcos. Hope that helps. Otherwise you could give my Whish list post a thumps up.

Yeah, I currently use it in the STL mode into a Mad Professor SweetHoney Distortion

I like it very much. Was very surprised comparing it to my modded Lightspeed. If I have the mid sweep on 200Hz (pot to 7 o'clock) it's very similar. This position compensates the low bass on the standard TS. The cirrus offers the choice between the ST-9 and the STL. I am still on the fence which...

You can easily beef up the Lightspeed to fuller Distortion. There is Boneyard Mod from Chuck with a standard pcb like the Mach1. Just 4 different parts. Here is Chucks post: https://forum.pedalpcb.com/threads/mach-1-overdrive-mods.1942/post-16352

Sorry I am from Germany, we have other brands. The steel wool is the very fine one called 0000.

Okay then clean your build: Remove the stray wires. Look for bad connections and shorts. Reflow the connections. Use good light and magnifing glas (ask me how i know).

For your wires to the board try a different approach to get better connections. First demantle the wire for 5 mm, the twist the strands until you get a straight bundle, then hit it with a bit solder. This sold piece is easy to stick thru the holes and can be soldered to the board.

Funny way to wire the switch pcb. Next time just save pcb for another project.

I use an alu primer (2 times with polishing the surface with very fine steel wool) every time except hammer tone and clear coat on alu. The laters are only polished before spraying.

This circuitlab.com site Brian uses is something to check out. Looks promising. Any experiences?

Does it have a drop down resistor in the input section?

I upped c3 to 10uF to achieve the same.

The easiest way to change the bass of a pedal is vary the input cap (c1: 9n6) or make it selectable with a switch or use a blend like Dragons Breath.

Try Chuck‘s mods to the Mach 1: Post in thread 'Mach 1 Overdrive mods?' https://forum.pedalpcb.com/threads/mach-1-overdrive-mods.1942/post-16352 This is what Szusalski did with his Speedy Sheep

It's a way to have a stronger lowpass with more dB.

I like the Ibanez ST9 and Super Tubescreamer. Both use a sweepable frequency mid boost (247Hz to 3537Hz) to alter the character of the TS. On the lowest mid setting it resembles a Lightspeed to me, at the highest it sound like treblebooster after the TS. The Aion Cirrus makes it selectable...

I think the Mad Professor Sweet Honey does and so also JimiLees Version, Honey Bear.