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Entombing that mess with a squirt of hot melt glue
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So I cranked the right side down by 0.10 mm (just over 1/6 turn) and changed the G92 setting to Z1.50 to move the plate up by 0.05 mm.
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The Z axis motor drives a four-start leadscrew that moves the Z stage and the thingomatic.xml file specifies 200 step/mm = 0.05 mm/step.
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So a super stock TOM can print upwards of 50 mm/s on non-critical parts, but something around 30 mm/s would work better should you care about surface finish.
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Overall, the thickness now lies within 0.05 mm of the 0.33 mm average.
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I had to determine the actual height of the trip point experimentally
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The switch must sit flat on a 120 °C platform, withstand being poked with a 220 °C nozzle, repel ABS, and trip with better than 0.1 mm repeatability.
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They don’t get too hot after an hour’s worth of printing
The Smell of Molten Projects in the Morning 