Yes, we do. Because of the slight variance due to the fisheye effect, if you want to add something to an item that you just cut out, align the addition to the pink design preview on the screen, not to the actual cut that you can see behind it in the wood.
As far as placement alignment being out of whack, that can be up to 1/4" at the edges of the bed, and is better (due to less distortion) right underneath the lid camera. There is an algorithm that corrects for that for each machine individually. (Still under development.) To reduce the effect, you always want to make sure the material is flat, and that you have the correct thickness entered. And if you can place the object under the lid camera there will be a lot less distortion in placement.
It’s also a good idea (for now) to leave about 1/4" leeway when you do the visual placement at the far edges and cutout areas on the material.
And if you need to use up a tight spot, just run a score on the masking at 2% power and 500 speed and you’ll see where it will hit and can make adjustments. (Shouldn’t burn through the masking with those settings.)
As far as alignment of the various design elements in relation to each other, those are always perfect if you include them in the same SVG file, so creating them in advance of the print is usually the best idea of all. That relationship makes the use of jigs a great way to go.
Tutorial and explanation here: