@crazyfrog89 I totally understand not wanting to waste your materials with test runs, the laser ply uses a water based adhesive and all layers are premium so it cuts cleanly. The cheaper ply often uses knotty wood for the inner layers and a resin epoxy for the bonding, this results in flare ups and is very difficult to cut. Air assist also helps a lot with cutting and for keeping the engravings nice and clean (less smoke residue).
I do use cheaper ply for testing if it's only engraving, and you can usually sand them and re-use at least once depending on how deep you burn. The quality of materials makes a huge difference to the results.