IKEA Lack table filament feed for M6 hose connector

Remix of the feed for IKEA Lack table. Fits 8mm hole. To secure the top side, just slide the lock into the slots. Unlike the original this has a hole designed for 6M screws to attach against on the bottom for a nice hose connector.

Note that you sometimes need to straighten the filament for v1 for it to not get caught on the lip of the connector.

**V2 improvements**:
- Feed tube width matches hose connector width
- Bottom has mated screw threads for tighter binding