Tony Fisher's Mental Block puzzle solve

This is another solve video for those people who requested it. In the 90's I wondered if it would be possible to transform a skewb in such a way that it resembled a Rubik's Cube. After a few rough sketches I realised it was possible, at least from some angles and made this in 1996. I originally called it "The Slab" but later changed the name to Mental Block. Mini Skewbs were not available at the time so I had to make it from a full sized Skewb. When Mini Skewbs did become available in later years I couldn't be bothered to start all over again with a small version. Plus I had gotten used to the very smooth rotation and clicking of the ball bearings which would be lost on a smaller one. To make it I first sculpted the two new masters from solid polyester resin. This was done using a saw, files and sand paper. I did not own a Dremel until many years later. I then made moulds in remeltable rubber (Gelflex) and cast the pieces in polyester resin. As with several of my puzzles the first ones were very poor but in later years I improved the masters so subsequent castings were better. For many years it was a very heavy puzzle though with excellent movement. After a number of years (not continuous) of slowly improving the masters I finally decided on a completely different approach. This was at a time when I was getting pretty fed up with moulding. I was still using remeltable rubber and polyester resin. Both of which are unreliable and dirty products to work with. Anthony Greenhill on the other hand had perfected a new way of making puzzle transformations. He was using some sort of plastic card and built little add-on boxes. This resulted in very accurate and light weight puzzles. However it can be a lot of work especially if weird shapes are required. It was perfect though for my cuboids and not bad for my Mental Block. So from then on I only ever made Mental Blocks from high impact polystyrene plastic sheet. Now they are much lighter. At last I was making really good quality Mental Blocks. On the earlier ones I used Skewb style textured stickers on the two opposite large faces and regular Rubik's Cube type on the other four sides. On my more recent ones I used regular Rubik's Cube style on all six sides. The puzzle is occasionally available on ebay so keep an eye on my auctions.