Hi Nelson -- You can use up to ReplicatorG v29 to drive the Makerbot Cupcakes and the SkeinForge version that comes bundled repG29 to slice prints for the cupcakes at Noisebridge. I updated the Noisebridge Makerbot page to reflect this... links below https://www.noisebridge.net/wiki/Makerbot http://replicat.org/ -rma