That was likely me.Ok, I'll try this one last time...the B2920 and the B2650 both use the very same engine (D1305). The B2920 generates more HP because of the increased rpm that it's allowed to run (2800 rpm vs 2500 rpm in the B2650).
Having said that, you'd be giving up some hp (at least 2hp difference at PTO) to run your flail with the B2650. As you mentioned before (and others above), you are already struggling with hp as it is. So, maybe its just not a good fit for your application.
The only reason why I mentioned the B2650 was that it was pretty close on HP to what you already have and would likely accept your current belly mower. I wasn't trying to sell you on one.
The B3350 would likely be a good fit, but it would seem that they come with some fairly common dpf issues (especially for northerners). I recall seeing some on this forum that experienced no issues at all with this model, but I'm not sure of their use/case or where they were located (north/south).
I hope you can find what you're looking for. Best of luck.
I bought a new B3350 in May or June.
My pre purchase research convinced me that the regen issues with the early ones has been resolved and I've had no issues. I'll let you folks know when/if I do.
I'm near Cincinnati.
SDT