the Muff to rule them all is the original, isnt it? my piece of the Pi *says in Gollum’s voice*

The ‘tab’ that limits the rotation probably broke of.
http://www.geofex.com/article_folders/potsecrets/potscret.htm
[img]http://www.geofex.com/article_folders/potsecrets/pot4.JPG[/img]

Trying to repair the ‘broken’ pot is doable but a gamble as there’s a good chance you will break it beyond repair and then what?
Since it still works, I would just use it as it is. Now you can go from min to max or vice versa with only 60° rotation instead of 300°.

Happy hunting for a new pot.

Normally, for these niche items I’d suggest Smallbear but even he doesn’t have them for sale, so it’s going to be really hard to find one.
He does list a pot you could use after a tedious amount of modding to both pot and enclosure:
http://smallbear-electronics.mybigcommerce.com/poteniometer-for-russian-big-muff-work-alike/
http://smallbear-electronics.mybigcommerce.com/electro-harmonix-sovtek-spares-1/?sort=featured&page=3
[img]https://cdn10.bigcommerce.com/s-sxoup5r/products/3762/images/6147/Russian_BMP_Pot__93201.1523243561.1280.1280.jpg?c=2[/img]

With the volume up, the pedal should not be quiet or any quieter than other Big Muff Pi’s. So there might be other issues. This has nothing to do with old or new.

Black Russian BMP uses linear pots though, so you have to turn the volume up more, compared to a lot of other versions of the BMP which use log pots, to get the same output volume.
But with volume at max on both, they’re pretty much equally loud.

Bass 9 – I think of this as unplugging my guitar and swapping it for a bass so I put it right at the front as if it were an instrument plugged into the pedalboard.

Rivera Buf1 – Good buffering of a long effects chain is essential to prevent high end signal loss. This is my only non-EHX pedal and it really helps to keep the signal sounding clean by the time it goes through all that cable and effects.

Hum Debugger – Does a great job of managing noise when I’m using single coils.

Silencer – I put almost everything else before the time based stuff in the Silencer loop. I carefully set it with the blend and attack so that it’s not too aggressive. Combined with the Hum Debugger it actually keeps the whole thing pretty quiet even when I have lots of effects engaged.

-> Silencer loop send ->
Knockout – It’s like being able to morph humbuckers into singles or vice verse. So, I treat it like I would adding harmonics or removing them before I go into everything else. Like an active EQ on my guitar or bass.

Attack Decay – This has to go before a compressor because it has a built in compressor and controls the volume itself.

Tone Corset – Input volume control and filtering at the beginning.

Doctor Q – Filters at the beginning of the like you. Some people like the sound of a wah (or auto wah) after distortion. I like it in front of the distortion.

Octave Multiplexer – Filtering and analog octave down.

Pitchfork – More pitch stuff. Digital this time. Again, I like it before dirt.

Frequency Analyzer – Ring Mod is a type of filter / pitch thing.

Deluxe Electric Mistress – Flanger. More filtering. I like it before dirt.

Bad Stone – More filtering. 6 stage phase shifter.

Small Stone – 4 stage phase shifter.

Good Vibes – Univibe 3 stage phase (sort of) phase shifter.

Mod 11 – Digital mod.

Cock Fight Plus – Wah after filters. Before dirt.

(Dirt time! I kind of go low gain to high gain.)
Lumberjack
Octavix
Soul Food – I keep the buffer enabled to clean up the line.
OD Glove – I run it at 18V for more headroom.
Satisfaction
East River Drive
Germanium 4 Big Muff
Hot Wax
Flatiron
Triangle Big Muff
Tone Tattoo

EHX Volume Pedal – Volume AFTER dirt so that the distortion will respond to my picking not my foot.

-> Silencer Loop Return ->

Canyon – Delay…delay…delay

Oceans 11 – Reverbbbbb. I like to verb my delay. Some people like to delay their verb.

Superego+ (with EHX Expression) – This lets me do some filtering AFTER dirt if I really want to.

Stereo Pulsar – Close to the end so that I can split the signal. This is one of my few stereo pedals. If I didn’t have the Mod 11 and didn’t care about stereo, I would put this before my delay.

Stereo Looper 720 – At the very end so that I can capture the completely effected signal in a loop.

This seems similar to what you have. Filtering first. Compression. Then Dirt. You seem to like your mod after your distortion. That’s definitely a matter of taste. Then your time based stuff. Some people like to delay their reverb. I like to reverb my delay like you. Then, finally the looper to catch all that goodness.

Lots of pictures of the Rams head inside here:
http://www.kitrae.net/music/big_muff_history1.html

The LPB1 has a very low input impedance, similar to a Fuzz Face, not *as* low but low enough to load down your guitar pickups.

The disadvantage (similar to a Fuzz Face) is that it may not sound good or as intented when it’s not directly connected to your guitar’s pickups but to the output of another guitar pedal.

Even a disengaged pedal with a buffer (any Boss pedal) in front of the LPB1 may make it sound too harsh, garbled and gritty.

You’ll experience the same thing with a Double Muff, Muff Fuzz or Muff Overdrive. Not so much with a Big Muff (despite the similar low input impedance) because of the series resistor at the input.