I have the RTR0550 on my 2370. I do a couple of half acre gardens each year and I have no problem with power. The tiller seems well built and does a nice job breaking up the soil.
Thanks agin guys. I'm going to tell the dealer to order me the RTR0542 Land Pride. I just rechecked the BX manual, and it's the only unit that actually meets the BX design limitations.
It will work fine for you, as mentioned in an earlier post, I discussed this with my dealer as to the design parameters of the 2660 and he recommended an RTR0550, I use it mostly now on our BX2200, no problems.