He also overdubbed a touch of guitar - using Big Black, my 25-year-old guitar.
My signal chain for rehearsals is generally Guitar -> Amp and all yesterday's recording was Guitar -> Twin Reverb. Today I was adding some Wah-Wah, and Martin also used my amp to add some slide, seeing as it was set up already.
Great fun, and the rough mixes sound very good. Four tracks ready to mix - I'll struggle to make the time to be there for the mixing, but that's OK.