concrete block making machine

Here is another of my projects with a twist. A client (https://www.fiverr.com/s/38lwaRY) needed a concrete block making machine with swappable molds to make solid and hollow 8*8*16inch blocks and 8"*4" cabro pavers(but they later cancelled on the pavers). So this is the result of my ingenuity as it allows the user to bolt the mold and plug needed as they wish. The design contains 6in solid rubber wheels but as you can see the mold has not bottomed out so you can easily swap them for 10in ones but if you need to go higher then raise the mounting point of the wheel axle.