I usually order a bunch of PCB's from Madbean for my "pedalfest" for that year. lol
It was shakey start, I muffed the 4:1 build once as I didn't use 9mm aplha pots and tried off board 16mn pots. I really didn't like the size of the enclosure I needed so I got some replacement pots and bingo! works a charm. Look I don;t use a lot of compressor, but it does the job when I need it.
I like Pedal Parts Aust, I did their Boost kit and works great. actually one of the best boost pedals I have.