Nice build there mate. I am sure you will eventually swap those steel wheels for plastic ones when they rust out.
The centre spine design of the LLM does not really allow a soft seat to be fitted. If you are handy with fibreglass a moulded seat is a lot better than a flat bottom seat.
Most importantly make sure you fit a decent seat/body belt. When you are screaming down the beach at 80 kmh and you can out, you do not want to be spat out of the kart.
