They only pop up about 30 degrees. So your 1/2" is probably about it. You can tell by pulling the legs out on your own when it's not hooked up. They'll pop up and lock, and you'll have to push the handles back down to retract the legs. You always tow with the legs fully extended and locked.
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX, Motosat HD-SL5 w/ SWM-8, Multiswitch, HR34 Genie
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake