From this part of your message I understand that your main preoccupation is to achieve and realize video glitches and effects in a genuine, completely realistic way, while having control over them.
I may be wrong but I don’t see much enthusiasm about soldering in your words (personally, I don’t have any myself!). Do you actually find the circuit bending part interesting in itself, or is it just a mean that seems required to reach your end?
In other words, are you sure you need / want to circuitbend anything in the first place? To achieve all sorts of glitches and effects you do not need circuitbent devices, not necessarily. Many glitch machines at various prices exist that allow for different effects, and they likely provide better / more reliable control than a DIY project, especially if one is not expert. You can find such hardware listed here: List of Artists Who Make & Sell Analog Video Hardware
Sorry if this was already obvious to you and I misunderstood your request, but just in case…as you wrote, there’s no guide about how to do these things.