I also have a clean, yet still thick sound I use for fingerpicking and songs that I don't want the heavy OD. The Minstrel set properly with one or 2 comps before it give this to me.
I had not tried the Octron 3 on slide but after watching Robert Randolph's Rig Rundown from 2011 he used a Cusack Screamer Fuzz (anyone have one?). Remembering you mentioning the Octron 3 I played around with the it. If I dial out the bass, I can get some great tones with the O3 into the Minstrel. The octave knob acts sort of like a tone knob. Thanks for the tip.It's not really appropriate for slide, but that Foxrox Octron is a nice pedal.
As Lowell George, Paul Barrere, and Bonnie Raitt have all amply demonstrated, you can't go wrong playing slide with a compressor in front of whatever you decide to use for any additional drive. Myself, I'm partial to CMOS inverter-based drives for that sort of thing. The old Anderton Tube Sound Fuzz, the Way Huge Red Llama, and the EHX Hot Tubes fall into that category. A number of Laney amps also use a CMOS inverter for their drive channel.
Of course the shiznazz for slide is a horseshoe pickup. Originally developed for lap-steel, though they seemed to be strongly associated Rickenbacker basses, the strings run through the sensing area rather than over it. It senses up-down and side-to-side movement of the string, and provides added sensitivity as the note is decaying, allowing the player to "work" the note's decay. Think Ry Cooder and Blake Mills. Jason Lollar is one of the only people who currently produce them, that I know of, though I'm sure there must be some micro-businesses that do.
If a person wants to play slide, you can do a helluva lot worse than using a harmonic tremolo of some form.
I made a 4049-inverter-based overdrive for Lindley when he was in town for Bluesfest, damn near 20 years back, because I thought it nailed his lap steel sound. I gave it to him and he was pleasant about it, but I have no idea what he ever did with it. For all I know it sits in a pile of stuff belonging to a roadie. That said, I should have loaned mine to you when you were over yesterday. They're nice for low drive needs.This is another slide sound I really like. He used Dumble amps, and I have a Fuchs ODS 30, which is a Dumble clone. Apparently.
When I hear people talking about 'stacking overdrives', I never took it quite so literally. Cool pics.