This is a cool overdrive. I think it will be very useful. Sonically it's similar to my favourites - the Rockett 45 Calibre and Majestic - but uses about 2-3 as many components! It has it's own thing going on and is such a welcome departure from the usual Klon/Tubescreamer/Rat kind of OD.
Cheers! I get the black boxes from Mouser - Hammond 1590BBK. And yes I used 5532s because they were the first suggestions as substitutes when I googled. I happened to have some. I might try some TL072s to see if I can hear a difference!
I really like the textured black finish. When I had a Harley I had the tank and fenders powdercoated in this finish, and now I have a Triumph Bonneville with the tank, fenders and side covers powdercoated in it to match the engine. I have a Cafe Racer seat on it now: