Binding placement can be tricky. You will need to install the fin before starting. Years ago I was taught to get a hexagonal pencil and balance the ski on the pencil, mark where that is then put the heal of the front binding on that mark. On my 88" Torrens that is 35" from the rear to the back of the front binding.
I was going to mention balancing the ski as well, since it's a one off custom, but I never used a pencil, that's a great idea.
Thanks for the info guys I'll go with the balancing trick.
I want to turn? Thought I was just going straight No plans to do much of anything to the edges. I rode the first ski this guy made for a friend of mine and I thought it felt good.
Grady Hill taught me that trick.