Luke posted a model at Shapeoko HDM Useful Resources
I used it to create my simulator for the machine, as well as my enclosure. I haven’t checked it for accuracy, but it seems pretty close.
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I measure the machine at 41 1/2 x 34 5/8 x 23 7/8 (The model is just a smidge smaller, 41.3 x 34.508 x 23.64)