The machine is delivered with a tempered glass plate, Securit and with polished edges.
The best way to fix it to the aluminum plate is to hold it by gluing by gluing the edges with a polyimide adhesive (Kapton):
Once the plate is in place, it is almost essential to add a little printing lacquer to ensure good adhesion of the parts. (voir Comment bien préparer son plateau d'impression pour maximiser l'adhésion des pièces)