[Espeefan]

One of these days I'd like to invest in a drafting table and arm, but the nice arms are a good chunk of money. Its a good investment though. Nothing wrong with the cheaper T- squares either.

On scaling a model plan from prints or drawings, the larger the print you have to work from, the more accurate your measurements will be. Sometimes though you have to make some compromises, in order to have a fully functional model. Things can't always be 100% to scale. Form follows function, in my opinion. If you can't find or make parts 100% to scale, then in those cases you just have to accept that fact and fudge the dimensions slightly, without getting to far off the proportions.