Yes, the red button
My thought is to measure the length of the longest belt on the original system and compare. Then of course you have to think of the added length that may come from other accessories, as well as sufficient belt wrap to drive whatever.
If someone wants to spend the money and expects new belts to be available in the future, go for it. My question is why spend the money when the original, or a factory serpentine system work fine.
I guess I'm more interested in functionality than beauty in this case, or there's an advantage I don't know of. Very possible...