That doubled up zip tie as both an anchor and a cable strap is money, I will definitely be trying that. You can just shove the wires right into your drill chuck if you need to twist them though, you don't need a jig for that. We all have to do some DIY at home every once in a while, but not everyone is a handyman. That's why we have searched for some of the best tips and hacks from the true experts in the field. My father told me of this method many years ago to repair cracks in engine blocks ect . I used this also repairing equipment also . There was a company that came in the power plant I worked at and they used this method to repair a pulverizer table that had a crack in it .l Good idea on pressure testing the head like that . Its also a good idea on aluminum heads like the ones on my ALH TDI engine for cracks . A learned hard lesson lol . I enjoy watching these guys get it done.