Lippyp Your seat looks awesome, here are some seats that I make for hot rodders in the US. Nice work, your kids a lucky to have a Dad that cares about them having fun.
I cut mine with a shop knife and a straight edge, one thing if you have a gas leak on your car it will eat a hole in the mat.by the way mine were the thick ones.
Great to be on the journal and I have a 20 by 42 pole barn that I do my metal work in.Also keep the hot rod in there when I am not driving it. Maybe I will be able to learn a few things or help someone also. Mike