Clocks

[T4TT]

Hi peeps

RUnning MS1 v3 in a VW T4 Transporter fitted with APX audi 1.8t 20v. Octavia VRS clocks from around 2003 age.

Two issues fuel gauge only reads 1/4 when full, do I need to change the sender I think it is from an audi a3 but can't be sure as a garage fitted it. Or can I do something else to get it to read right

Also how do I get the rev counter working. I believe i need to take a wire from each bank of coils to a diode then to the clocks. But any idea exactely which bits do I need?

Finally how do I calibrate all the temp sensors? IAT, COOLANT are both factory ones and need to make sure I'm getting right figures.

Thanks
Jon