Pylon 8 problem

Hey, all, I'm having a problem.

Before the winter weather grounded me for a couple of months, I was nailing
Pylon 8s (for the commercial test) almost from the moment they were
demonstrated to me.

Now I've got everything else down, but the easiest *$@#^&! manuever of them
all for me is suddenly giving me trouble. Now, all of a sudden, I can't
seem to keep my turn radii rational. Ie, I used to have no problem keeping
the reference point at its place on the wingtip but now my turns are wide
and I keep having to correct.

I've tried shortening the distance between reference points, reducing power
slightly and adjusting my altitude, but what I really want to know is what
exacty I'm doing wrong all of a sudden. My instructor, unfortunately, isn't
around this week and I won't be able to consult him before my next practice
flight.

Any tips?

-c