Drag knife holder for chinese CNC

This is a simple drag knife holder for Roland-type drag knife head.
Apart from the attached stl files for 3D printing you will need:
1mm x 18mm x 40mm compression spring ([example spring](https://www.ebay.com/itm/Wire-Dia-1-0mm-OD-17-20mm-Length-10-to-100mm-Helical-Compression-Spring-Select/292316182940?hash=item440f66f99c:m:mPTjyFmb59pv6KwMigxMlFw))
2pcs 6mm x 70mm linear rods ([example rod](https://www.aliexpress.com/item/3D-printer-rod-shaft-WCS-6mm-linear-shaft-length-70mm-chrome-plated-l