Eastern,

The Merlin is an agressive engine. My Rabbit is smoother and cooler, so its kind of like a souped up Rabbit which is why it puts out 21/22 pounds. I have had both in the FEJ F16 and prefer the extra punch of the Merlin.

IMO this is the best set up you could ask for, light, powerful and economical (only main tanks required)

Mav