Anyone doing double sided engraving? What about cutting images glued onto acrylic?

Anyone doing double sided engraving? What about cutting images glued onto acrylic? How are you doing the alignment?

I done a few80mm circles double sided etched, etchfirst ,then cut of circle then i cut 0.5mm circle bigger as circles are not 100% round,then flip over and et h back

Without moving the materials you are cutting from,i use magnets to hold work peace

I add reference pin holes or cut the frame first then clamp the cut waste piece down which allows you to drop in you work back to your position. Getting it out needs planning or some pockets cut in the frame to get your fingers to where you can get part out.