UPDATE!

I have solved my issue. Z1 was set to ‘0’. Ugh! I spent an hour reading the entire manual that came with my EGX-350 last night and when I came across the section on setting Z0, Z1 & Z2, I thought, Ah Ha!

I have had this EGX-350 for like 8 years. Never modified Z1 or Z2. Did not even know what they were for. They were set at whatever settings the thing came from the factory with. Obviously that setting was changed - I’m guessing one of the kids that kept visiting my booth at the horse show this weekend, looking for the candy jar that I had hidden after they kept taking handfuls of candy, pressed some buttons on the handy panel and ‘poof’ Z1 was reset to 0.

I think it highly unlikely that I did this myself accidentally after engraving hundreds of items over the past eight years, as this would have happened long before now. But anyway, however it happened, it’s all good now. Engraving just like before after I got the Z1 set back to the deck level.

Just wanted to pass my solution along in case someone else has this issue.