I am thinking of building my 1st track. Mainly for testing my cars at first and maybe racing in the future. Looking for a scale 1/4 mile. Bench I would build on is 19 feet. Adding a drop hill from the end of the bench would make everything approximately 23 feet. Allowing for some finish line cushioning. Just not sure where to start after the bench is cleaned off. Track would run left to right if that matters. Any tips, tricks, advice, pointers, help, etc would be greatly appreciated.