I can't get past the image of trying to assist feed a sidewinder.

That said, I've only heard of the phenomenon once or twice in all the years I've been doing this, so I'm no help at all. I imagine it's a lot trickier process to look inside the mouth of a sidewinder than it is to look inside a ball python's. But then again...you've already assist fed.......

You're a braver man than me!!