The advantage of the Mint over a downloadable arc or two point protractor is its precision.
The drawn arc and null points of the Mint are very fine indeed and the flat mirrored surface allows you to adjust accurately to these lines (and of course the mirrored surface and guidelines at the null points assist in avoiding parallax errors).
But it will not save you from making those tiny adjustments - these are what the Mint is all about! You must make these micro adjustments to avail yourself of the Mint's precision. The precision possible with the Mint is much better than 0.5mm - Magnification is a must!
Like the designer, I recommend strong natural light if you can avail yourself of it.
The drawn arc and null points of the Mint are very fine indeed and the flat mirrored surface allows you to adjust accurately to these lines (and of course the mirrored surface and guidelines at the null points assist in avoiding parallax errors).
But it will not save you from making those tiny adjustments - these are what the Mint is all about! You must make these micro adjustments to avail yourself of the Mint's precision. The precision possible with the Mint is much better than 0.5mm - Magnification is a must!
Like the designer, I recommend strong natural light if you can avail yourself of it.