That is awsome!... I'm trying to print a small bed I downloaded off thingaverse for my daughter and am failing hard. Im sure my problem lies with slic3r (prusa edition)... SD card models are printing like a charm. What program you use to slice that up?
I'm using the Prusa edition of Slic3r, I do find with the PEI bed that I often need to use a brim to stop prints jumping off the bed, especially if the parts or supports are small. Wrapping the supports in a sheath helps a lot for me also.