Thanks :smile: , bit expensive for a bolt thought, gonna look for alternatives.
Brother works in Mercedes as a mechanic so access to heat or tools is no problem.
i found m8 x 50mm head cap bolt 12.9 on this site for 22p each (https://www.accu.co.uk/en/cap-head-screws/16114-SSC-M8-50-12-9) -...