along with the length question I have always wondered on the model 6 or 7 what is the width of the cockpit at the lower aft door opening. as well as what it the width of the firewall at the widest point? I know that the model 1-4 at the lower aft door openings is 34" in width. We have a model 1 and a friend has a model 4 and I have measured them. where they get the difference is at the stringer that runs down the fuselage about shoulder height. the Model 1at the Dimension (half way up the rear door opening) is 36" and on the model 4 its 39.5. always wondered if the newer models that have a 43" cockpit have the same width at butt area of is it all in the shoulder area. As well as if the firewall is actually wider.