Use Epoxy for a reference straight line

[feldah]

https://www.ebay.co.uk/itm/Kinex-Eng...rPlT:rk:9:pf:0
or something similar.
Regards
Mike

Yes but the price. ;-)

[mekanik]

I know but you can't do the job without the kit,that was just an indication there are some of a lesser grade that are cheaper and also there is the second hand option, i was looking @ these myself the other day to see if there was anything reasonably priced.
Regards
Mike