Sounds like ya got a good one, apart from the seized caliper.
Yes, all of them require some effort & planning to center stand the fat Kaw.
I'm 6'4" and 400lbs so it's not too difficult for me, but some can even do it with bare feet
My C14 center stand is so easy that the first time I did it, after 25 years of having C10s, I damned near threw the C14 out of the garage backwards
Your heel should be behind the footpeg so it sounds like you have your feet too far forwards.
I have size 16s and my foot doesn't hit the fairing.
Any pics ?