No worries mate...wow nice work!..Yeh I tend to apply scale and measurements straight away..I guess I do it for a living LOL...USUALLY things are standard..like doorframes..ceiling heights etc etc..so I basically put the image up, grabbed a rule...assumed the 2.4 for the ceiling and worked out how many MM on the rule to make 2.4m...then go from there..I used the door width as a check...and off you go. Yeh the angle is a bitch but you will still get it close...for the stairs I just assumed 1.2m wide as thats the Federal standard here. Good luck with it man

cheers bullet