Well I have a k30 and the above statement is a bit hasty in my opinion as I have no issue landing with a k30 in a 90mm EDF airframe with engine still idling.
K45g3 however can't comment on residual thrust as no specs are available.

The k45g3 has been posted on Facebook flying a foamie, it's clearly near release so does exist. The x45 does look great, I have one on order and customers are just getting their hands on them now in Europe.