I was an early adopter of the SmarTractor’s precursor, the UNI-Pro. I like it, although I have tended to use my 20-year old WallyTractor for my 9-in Graham. The current Universal Wally does not have curves for 10-in Grahams, which is what I need, and a custom WT for this arm is $800, I learned this morning. I’m used to using arc protractors, hence my reaching out to Yip, but $800 is more than I want to spend on single-arm tool.
Related question for UNI-Pro users. I have a Graham template and related micrometer settings. Are they specific to effective length? In other words, can I use them for a 9-in or a 10-in Phantom with the same results? I have an email in to Daniel asking the same question.