Get on to the area Calor rep and tell them not to send Jobsworth A to commission it. I've had Calor techs turn up and threaten to switch off supply because they deem something "unsafe". Their colleague turns up 3 days later and says "that's fine, no problem" and signs it all off. LPG regs are a bit of a joke, and no indy LPG registered fitter really wants to mess with Calor, so they usually say whatever Calor is happy with.I made mine the size for feet to sit on and was told that wouldn't do. Had to be the length of the tank not just to take the feet.
3m should certainly be long enough to take feet. You may be lucky and not get an anal jobsworth to come and comission it
Calor man said 3.5 m and it's on the paperwork. Got caught up now so should get it made right tomorrow.