So far, I've used three different motors in my HK450 Pro's.
I started with the Typhoon 2218H.
Note that the Typhoon motors use a centrifugal fan, which is designed to draw air thru the motor from the top, exhausting it thru the fan at the bottom. Installed in a 450 Pro, therefore, the fan needs to be reversed compared with the orientation shown in the image, which is how all my Typhoons came. To reverse the fan, you simply remove the bottom retaining plate, and the fan itself is a loose slice of extruded aluminium alloy.
If the fan is left in the default direction, there will be much less airflow thru the motor. The default direction would suit helis like the Mini Titan, where the motor is mounted above the maingear.
I used the 2218H for quite a while in my 450 with a Turnigy Superbrain data logging ESC and various 3s 2200 25c packs.
When set up incorrectly, (too much pitch!) the motor pulled peaks of up to 55A, but with a proper setup, running a 13t pinion, current draw was in the low to mid 30A range.
On my first 2218H, the top bearing started to spin in the housing, and after that the shaft also started to spin in the bearing. This caused enough slop for the magnets to start rubbing on the stator.
After maybe 150 flights or so and several crashes, the last crash resulted in the shaft breaking at the circlip groove. The Typhoons use a 3mm shaft and bearings, and the shaft diameter steps up to 3.17mm at the circlip. I believe that makes the shafts very prone to breakage, with a large stress concentration at the circlip groove.
Shafts don't seem to be available, but if you used a 3mm pinion, you could make a simple shaft from a 3mm drill rod using a spacer or shims under the pinion to retain the can, and therefore not weakening the shaft with a circlip groove.
Overall, it's not a bad motor. You should check the tightness of the grub screw at the bottom of the can - they were loose on both my 2218H's.