The combination angle feels very very high, which is in itself a good basis for such a device. Moving the ruler is rather sluggish (positive) and especially over the complete length of ruler-equal. Ie do not care if I reversed the move ruler from left to right or, I have always felt expend the same force.
However, that's all just "bells and whistles". A combination square in the price range must be simply accurate, otherwise a look and feel also bring much.
And what can I say: it was an annoying procedure: put board and taken with a normal pencil by envelope method two strokes. Result: useless, because I have seen no difference. Optical could be seen only a dash. Well, I thought to myself, then just now with the 0.7mm air pencil. Result: re unusable because again only "a" line could be seen. Ok, in my workshop there are also 0.5mm face pencils. Again, the result is useless because only one line was visible again. Indeed, even with the 0.3mm air pencil is only one line visible. This precession is just amazing, especially not in the expected accuracy. Even for the 45 ° stop all I can say in my combination angle: Watch out!
The 11MH-300 is a clear "must have"!
Who wants to get to know even more possibilities of combination angle, should look at the website of Starrett up times. And my carpenter angle I no longer use since.
Tip for last: the angle always good care (eg in oil-wrap).