Looking for input/help on the Pro Tram System from Edge Technologies

[Arbalest]

I'd use a pro tram if I had one but it does measure over only a relatively short distance. As others have said a single gauge on a longer arm is likely to be more accurate if time consuming. This is after all how it was done until the pro tram appeared, in fact a guy I used to work with just used a bent rod and cigarette papers!