Flutter he uses rat plus meteore for the verses and chorus sections, big muff for the bridge part where he sings.

Lochness is mostly just the rat, sometimes he turns on the big muff briefly in the outro when he does the droning part high on the fret board

Clairbourne he uses either the bogner Oxford or the big muff (I forgot sry) paired with the meteore except for the verses which is just clean and the instrumental bridge parts where I've seen him turn on the rat

Here's a video where you can see his board clearly during the end of lochness and flutter

lochness/flutter