Ok so over the last couple of days Ive also been getting my etch on! 

First time Ive really done some proper etching with my laser cutter. So theres been some experimentation and some minor failings...

I did in fact make a test etch block to figure out what speeds and power levels to use...

But even though I made this, when I went to etch my parts things didnt quite match the test levels... 

To begin with the etch level was too low, so i decided to run it again, even though I did clamp the part down, it seems not well enough and there was some shifting...

In the end though, I ended up redoing it and I got some pretty decent results. 

This last picture is just a test fitting. And all looks good. These acrylic parts will also get some side lighting, and each layer will be individually lit.