Sculpfun iCube is a great laser engraver/cutter, but positioning is not easy, since it is not centered, or marked in any way.

This frame serves two purposes: help positioning your items to the origin (0;0), and provides a blade-type elevated platform. Just assemble the frame using magnets (or if you want a fixed frame without the option to disassemble later, you can glue them together), push them to the back of the engraver, and the iCube's original cover will help stay in place.

The frame has two positioning guides for the X and Y axes. You can put them in their designated positions, or when You don't need them, just store them on the frame itself, so they won't be lost.

The back rail helps keeping the frame in place when the iCube protector cover is not used.

The ‘house’ icon points to the origin to make it easy to find it without the positioning guides.

For the blades I use 23x23 aluminium corner guards, but smaller sizes can be used too, as long as they are not larger (but even in that case you could use your corner guards, but you will have to lift the frame)