Depends on your budget, obviously a £100 gauge is better than a £10 one.....

My Defi sender fitted into the original one's place at the front of the head. I need to either take the loom apart and move it to the back of the head, or make a heat shield for it

I'm not that bothered because I know how my car is and if I plan on abusing it all day I plug the laptop in and check on it properly, along with other things.