My experience is with the marstrom center sheeting tramp system On a sloop rigged Tornado... it is by far the best system for the reasons mentioned. It had foward and aft cleets in the casting for up and down wind. The tramps were heavy duty and tightened to be really firm. Most of the T sailors seemed to move away from their center sheeting to a rear sheeting system when the chute was added. On the deck it was a bit in the way with a chute and you could kick it out of it's cleat in a jibe.

Mounting the cleat on the boom for a spin boat would solve the room on the tramp issue however I am not sure how you would cleat it or release it down wind in breeze when you would be on the back of the boat.

Many of the A cats are using the ronstan flip flop ratchet block with cleat on a carbon 2 inch boom. You flip the rails and it cleats forward. It's great up wind since you hand hold it most of the time but you can cleat it forward to make adjustments or tack. Down wind the sheet is foward of your body and you can look foward, drive and sheet without turning into a pretzel, you don't cleat it doing the wild thing.