Here are the final pics. Project is complete. It's now called a Yerf 3203HD-XL.
Padding and grip tape.
The cart fits snug on the 4x8 trailer. (HF special- $209)
This is how I extended the throttle/brake rod. Just threaded rod with a coupling.
The end result with the oversized operator. The seat is forward about an inch, with the seat all the way back I can't drop the hammer as easy.
Total cost was about $30 since I already had all the metal.
Bought 2 spools of welding wire, 1 can of primer, 2 cans of paint, 5 pieces of pipe insulation & a small roll of grip tape.
Thanks for all the compliments! Any questions, feel free to ask.