I have quality problems with the MXL belt. I’ve ordered more from a reliable (but more expensive) supplier, and it should be here in a few days. A few kits have shipped already (with good belt), and a few more are packed and waiting for couriers to pick them up. Most still need the belt, so they will be delayed a few more days. I’m sorry for this.
I still need to contact a few buyers to check whether they wanted larger kits, or NEMA23 upgrades. If you’ve ordered extra belt or NEMA23 motors with your eShapeOko kit, expect an email soon.