Just to point out one real downside the TTB does have, its printed lines are pretty coarse. I'm sure the same protractor with finer lines (aka, a Wally) would allow better accuracy.
It's thicker than an LP, though it's not quite 3mm. For best results you have to raise your arm up to achieve normal VTA. No problem on some arms. Major headache on others.
It's thicker than an LP, though it's not quite 3mm. For best results you have to raise your arm up to achieve normal VTA. No problem on some arms. Major headache on others.