MI Effects made some really handy pedals; this is another underrated gem. This has a massive gain range; it'll do almost clean right up to pooped-pants-filthy. The clipping switch on the top allows you to switch between a more transparent overdrive and a thicker, mid heavy fuzz style drive. Stick this between your fuzz and your tweed amp and sauce up your riffs nicely.

Model: MI Effects Blues Pro Overdrive
Made: Sydney Australia, recent model
Type: blues-style overdrive
Power: standard 9v supply or battery (not included)
Switching: buffered bypass
Equivalent new street price (approx): $149aud
Mods: velcro attached
Accessories: no box or manual
Condition notes: used, very minor marks, very good condition