Step 2: Let the build begin!
I used a 10mm (0.4 inch) drill bit and drilled a hole in the middle of the lid to get things going, from there I used a hobby knife to cut the hole to size. Eventualy the PVC sleeve should fit snugly in the hole.
Be very carefull here, cutting in you finger with a very sharp hobbyknife actualy doesn't hurt all that much. But the stitching to close up the wound will hurt very, very much!!!
After inserting the sleeve, you can hotglue the two together. The lid I used hapened to have a nice reservoir for the glue to settle in, if yours doesn't, try to get a good amount of glue on both parts. The glue is for holding the two together and make an airtight seal.