I'm relatively new to the wonderful world of aspidites, and for the most part, they are great handlers. I say for the most part, because my male BHP (Lucifer) and I pretty much have an enactment of WW3 until I get him out of his enclosure, & then he is fine (mostly).
Though, as with all my snakes, I NEVER get complacent whilst handling, even moreso with aspidites, given their known propensity to just "have a munch".
The whole feeding in a separate tub thing I believe is to appease the handler more than anything. Whenever I open the doors all my snakes will be on alert, but they don't attack me, just seem to be watching intently. Lucifer is the only one who is all like "Come at me bro", but that is just him, it has nothing to do with the fact he thinks it is feed time - He just likes to throw down with me !
The day after I got Lucifer I had him out and he was fine, just having a bit of an explore, then I noticed he was nudging the palm of my hand with his nose, he did this for a couple of seconds and then just opened his mouth and attempted to latch on, though I was quick enough to move my hand away and he just forgot all about it and was calm as ever. Was it a hunger thing ? Well I didn't have any food out, and the feed record from the breeder indicated he certainly wasn't underfed, so I don't know.
My female woma does the nudging thing every now & then, now I just know to move my hand away and there's never been any problem.
My aspidites are my only snakes who also do the nudging thing with their prey, and then proceed to just open their mouth to comsume it - There is never any constriction or "kill" involved.