@ DEnd. After reading your first post again I see what You meen by not ruling out fibreglass (just got stuck on carbonfibre the first time
. Also had to read your second post twice, since the first time I naturally asumed You ment the computer program. Which I do have at work but not the time to sit and make a plan for my camper on workhours. Smart thing though to make a mock-up in cardboard. Thanx for the input!