Magnetic Effector for Kossel using hksupport 10mm ballbearings
By cycologist
Free
It's free to download
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This design assumes that you are using:
16-x-10-M4-Threaded-Steel-Ball-Rod-Ends-for-Kossel-3D-Printer-Magnetic-Joints
from http://stores.ebay.com/HKSupport?_trksid=p2047675.l2563
Free