Depending on your version of LongMill router mount, you will be able to mount your laser assembly on either the left/right side or front of your router mount. If you have a side fastening router mount and wish to upgrade, you can purchase the router mount here. https://sienci.com/product/router-mount-for-longmill-benchtop-cnc/.
Left/Right Side
Find your router mount hardware – 2pcs M5-12mm socket head screws found in Bag #1: Small Parts
Align the 2 holes of the steel laser mount to the 2 holes found on the left or right side of your router mount
Begin to thread your first M5-12mm screw by hand, thread your second M5-12mm screw by hand.
Use a M5 Metric Allen Key to tighten both screws until both are secured.
Front Side
Find your router mount hardware – 2pcs M5-12mm socket head screws found in Bag #1: Small Parts
Align the 2 screw heads found on the front of your router mount to the outer 2 holes found on your steel laser mount.
Press your steel laser mount until the back is flush with the front side of your router mount. If you’re having trouble getting one or both screw heads through the steel laser mount holes, attempt to wiggle the steel laser mount as you press. If you still encounter resistance, try sanding the steel laser mount holes until you can press on.
Begin to thread your first M5-12mm screw by hand on one of the inner holes located on the steel laser mount, thread your second M5-12mm screw by hand on the other inner hole located on the steel laser mount.
Use a M5 Metric Allen Key to tighten both screws until both are secured.