Mindful of the issue of smoke and fumes and not wanting to have to cart the Emblaser outside if I was doing work that generated a lot,  I've done a quickie to,  hopefully,  deal with the problem,       The box is a 70 litre Really Useful box which holds the Emblaser quite easily with just a restriction on how high the laser head can be raised when in use.   I reckon I will get up to 20mm clearance under the laser cover so that should allow me to work with the materials I am liable to use