Step 4: Filling in the middle
Picture 1 - the main part of my time machine is a big lens that i got off the repromaster, i constructed a small tube for this, and added a little circular metal ring ontop also, again paint everything card like black.
Pictures 2 and 3 - Using various parts, i then played around to get a good fit, - most my inside were taken from the inside of hardrives, cd drive, and old floppy drives and a few other bits and bobs.
The key is to use your own creativity, and lots and lots of super glue! (bout 8 tubes for me)