Appreciate the replies. To clarify, my 18t box is for taking my kids to competitions. It has full living and can stall 5 horses. We are not professionals at most they win a rosette! The trucks less than 10 years old and just recently when it came back from plating, it came with a certificate as to why the Tacho doesn’t need calibration.
The truck I’ve been asked to drive as a favour is basically a straight livestock carrier, belonging to someone else . I would take it to market they would buy/sell, I would not be paid. Should I use a Tacho for this?