Those who complain about lack of power are almost all HST's. I have the CK25 gear and have never lacked for power. I had read about the power issues with HST in the lower end of the HP ranges for Kiotis and that pushed me to go gear. Miss the conveniences of HST sometimes. But, glad I went gear for the power. It's a brute for just about any task, even chipping dry 5" hardwoods. Probably about equivalent to a CT230 HST.
I could definitely see that, the HST does seem to sap a good bit of power at times.