Well it's took me quite a while to build and fit the damn thing but only a few miles to realise what everyone has been saying....

Scoobs run very very rich!

I'll keep it in the car and check it every now and then but mostly it'll be switched off.

It was quite satisfying to do as a project, especially when it worked first time Thanks to john for promoting the idea and I'm sure it'll be useful with extreme breathing mods...

I'm just glad I didn't by a unit that does the same thing.

F
PS I wonder if we'll get the same results with a DIY knock meter????