G’day, This guide is for the Leetro Controller and the Ruida RDC644x & RDC6432G with a single glass Co2 Laser Tube, however this can be adapted to the Ruida RDC 6442.
The PDF Document contains a guide to performing this upgrade.
A Video about this upgrade can be found on my YouTube Channel. https://youtu.be/Yz1k1gT8KqE
After purchasing this document, and you are still needing assistance do not hesitate to contact me for support. If you have any questions please email firstname.lastname@example.org Cheers Matthew