Austers are easy to fly but they are hard to land. The application of flap involves the bodily functions of a chimpanzee and stalls with full flap and power always result in a sharp wing drop. My J1B had a 28KT stall speed, and one had to plan every landing without use of stick shoving as most nosewheel drivers do normally. Anything but back pressure on the stick is a recipe for disaster. There is no need to stay off the brakes as they are useless anyway.
On take off, one had to judge when to apply forward stick because too soon put down pressure on the mains thus increasing your take off roll from 22 Yards (a cricket pitch), to about 30 yards.
Climb out dictates accurate ASI monitoring as the prior mentioned stall speed and uncomfortable results with power.
They can be refuelled in mid air by opening the door and shoving a hose in the belly tank so a siphon from the drum in the back is possible. Check temperature prior because an overflow will freeze your hand and it is difficult to screw the cap back on. (this is not an approved operation, but who is going to stop you).
My P3 compass was mounted top of the windscreen with a mirror and took a bit of getting used to. Tiger pilotss had it much better in this regard.
Oh, one last thing. Get used to the pre stall buffett, it's the only warning you get. Treat the aircraft with respect and you will enjoy every minute you fly it. Those who openly hate Austers usually had a nasty experience and gave up.