Usually I can manage it okay, but I think the two guys I was working with then were a little more... "beefy" shall we say than what I'm used to. As for the other two, their own flexibility might be an issue in addition to the size of the uke, and in one case, with a dude who has spent a lot of time working out, his own thick thigh muscles might be getting in his own way.
Mostly, I want them to start thinking of their feet and legs to be just as useful as their own hands. Tomorrow, we'll probably go over the same drills as Monday (maybe an additional one), and see if we can't iron out some wrinkles.
I've got a number of entries, though, that I'd like to practice and explore, if anything for my own education, so hopefully it won't get too frustrating.