Beautiful execution and first of all congratulations on the idea and technical sense. What I missed in this performance and it would probably be a bit more work, that is the possibility of adjusting the height of this vice because not everyone is as high as the contractor of this patent. This height would suit me, but there are people a bit smaller and there are also those who measure more ... But overall it's a great thing. Well done you.

Very good idea, universal model, can also be used for stands for supports for area lighting

Great idea and execution. You can praise for a long time, but I will still take up criticism. In order to improve an excellent fixture.
In my opinion, at least two mortgages are missing, two pipe sections inside the tire at 90 degrees. That is, before pouring cement, it was necessary to place two pieces of pipe inside, say 32 mm, which would peek out a little from the side of the tire and into which, if necessary, something could be temporarily inserted.
No, not what you thought, but a long pipe, a crowbar, something that will give stability to this machine with a vice, if, for example, you need to heat and bend down the muffler pipe in a vice, for example. The solution is very simple, easy to implement (if before pouring cement), but necessary for types of work that require additional vise stability.