Recommendations for Adding to my DIY Pedalboard

[Unknown_User]

I'm pretty new to using pedals, but I recently started making my own for a bit of a challenge and I'm looking for my next project.  So far I've done a fuzz pedal (copy of a Woolly Mammoth) and am just about to box up an envelope filter (copy of a DOD FX 25).

So what should I go for next?  Preferably something suitable for either a rock'n'roll covers band or a heavy rock band.  I thought maybe an octave pedal but I'm struggling to find a schematic/layout for a bass octave. 

If anyone has any recommendations for any type of pedal that might be appropriate to add, especially if there's a link to a verified DIY build of one, then I'd be very interested to hear them.

[Johnny Wishbone]

I have a vero layout of a Boss OC-2 somewhere. It’s a stripped-down version without the 2nd octave down (which is largely pointless on bass anyway). I’ve built a number of pedals the last 3/4 years and most of them are fuzzes/overdrives/distortions - the Darkglass clone kits from Schalltechnik are great - but I do also enjoy a good tremolo, phaser and some other modulation stuff.

[Johnny Wishbone]

[paul_5]

Good chorus layout too, but you’ll need the proper ICs.

[Unknown_User]

Cor!  Thank you both!  I'll have to have a crack at those.