hi there
I think the main problem with distortion in plans is nothing to do with the paper that they are printed on - but the method of printing. If you look at some of Model Boats' free plans which come with Magazines there are 1 or 2 of them where the frame drawings dont match up with the side elevation or the plan view. Even though, when drawn by the draftsman they are correct on his original copy, by the time they go to the printers to be prepared and mass printed, the printer shuffles segments of the plan around to fit a set size of paper. The programme/method the printer uses may distort the drawings.
The process of enlarging on some these printing machines - can and do stretch at wrong ratios sometimes,. In other words, the height doesnt correspond with the length of the item being drawn. To overcome this, we should know what scale the plan has been drawn at. We should know the correct length of the model we are building and adjust lengths on the plan accordingly,.
aye
john