Here is a picture of my new mainsheet setup. It runs more freely and is easier to get to than the original! It has plenty of purchase too!

I used a 75mm fiddle block with a cam cleat, becket, and swivel on the traveler and a 75mm fiddle block above, on the boom. The outlet from the upper fiddle block, off the large sheave, goes forward to another 75mm on the boom and back down and aft to the main sheave on the traveller block and to the cam cleat. I used all Harken Carbo blocks. They run well.
After our first sail with it yesterday, I realize I need to change the angle of the cam cleat. Other than that, it works great!
Thanks,
Andrew

I used a 75mm fiddle block with a cam cleat, becket, and swivel on the traveler and a 75mm fiddle block above, on the boom. The outlet from the upper fiddle block, off the large sheave, goes forward to another 75mm on the boom and back down and aft to the main sheave on the traveller block and to the cam cleat. I used all Harken Carbo blocks. They run well.
After our first sail with it yesterday, I realize I need to change the angle of the cam cleat. Other than that, it works great!
Thanks,
Andrew