Hi. 2 years ago, I've built the BazzFuss pedal as well as a Fuzz Face style pedal, following the schematics on the web. As they are the easiest ciurcuits to build, I didn't need specific kits, but I want to dive into some modulation pedals like uni-vibe, flanger, but they are far more complicated ->

-> I was wondering if anyone could recommend me some DIY kits that could get me started on building such circuits. I am mostly after some sort of univibe or harmonic trem style circuits. If you could recommend me some medium to budget options, preferably in Europe, I would truly appreciate it. Also, any advice or warning would be very welcomed. Thanks a lot!