Hey, the GlowForge has a tough and beautiful exterior, but there are a few items that if dropped on the lid they will shatter the glass. Dense ceramic items, particularly magnets, can shatter the top even with a very light/short fall.
It is a $200 repair (parts & labor- very reasonable I say) but another $200 round trip shipping and the loss of use of your beloved GlowForge.
I decided to be proactive and ordered a think table top clear plastic sheet off Amazon. I won’t leave a link because I don’t have any referral side business or anything, but I ordered this one and it is very nice and needed only a tiny amount of trimming.