Congrats on the new female, sounds like you found yourself a nice deal at that show!

As far as Khan and handling, as has been said just take your time, slow and easy with him. You've got upwards of 20 years of time with him so a few months now of steady, calm handling is a small investment really in the greater scheme of things. As well, it has to be said that some snakes just won't take to much handling...they are afterall snakes and not mammals that need much interaction with humans. Overtime I think you'll find Khan's tolerances and what triggers him to be a bit more jumpy.

Couple of examples....Kyna our 2 year old female BP doesn't seem to mind being handled however after about 5 minutes or so she likes to be put down and allowed to just meander around the carpet (under supervision of course). If you force Kyna to stay in your hands instead of being free to roam, she'd react poorly. Rionach our yearling female BP on the other hand, seems to consider me a large, warm living hide. If she is down on the carpet and anything startles her she immediately slithers back to me so for her I need to be nearby all the time.

I think in the end it all comes down to knowing your snake well, being sensitive to it's subtle and not so subtle cues and respecting that when it's all said and done handling is a gift and a privilege for the keeper. It's not a necessity for the snake but rather a pure joy for us humans.