Solved

Tech guys

Is it vital to have this chaps mental number be 20 or near as ? Or Would 13/15 do. 

Higher all the numbers for all areas the better it will be apart from the weight that's the opposite so lower is better. 

Isn't the OP talking about a Technical Director and not a driver?

There is no staff or driver selected, not that I can see anyway. But my first answer applies if talking about the drivers if talking about staff then numbers don't mean much but the level and stars is more important. 

? moment. Lol. 

Yes if you are talking about tech guys then numbers don't matter focus on thier level and stars. 

I was miles away ha ha.