My Habu 32 with a p20 was quite the rocket when the fuel was getting low due to lower flying weight. Problematic to take off on grass though and often felt like it did not have enough power when fully loaded. I saw the pics of the K45 Habu and I'm sure that would be one heck of a rush to fly, although gut feeling is that the added weight could make grass takeoff's very hard on the undercarriage and very short flights due to size of fuel load. Probably fine on tarmac??
I saw the M35 at the Jets Munt stand at Jetpower a couple of years back. Similar weight/size to the P20 but an extra 1.5kg of thrust. I think if that turbine ever comes to market I will resurrect my turbine Habu 32 as I've subsequently sold the P20 to help fund other projects.
Would love to see a video of that K45 Habu in action though!!!