Thanks everybody!

Oakleaf: Actually, I used the red Look Arc cleats (6 degrees?) for years, so I am used to float. The loose feeling with these SPDs isn't just that I can move my heel side to side - I feel like I can pull up slightly, and rock the whole foot around every which way. Not a huge amount, but it is definitely there. Not at all like the Shimano MTB ones I have. My friend has the same pedals, and doesn't have that going on.

Thanks again - gotta go to bed now.

Jan