Slips in turns and landing with winglets

I was training a student in a 2-33. If you don't learn to slip that thing, you are going to land it all over the place. Let's just say I was fully practiced up on slips to land. So here I am at New Castle in my LS-6, I'm high on final, spoilers and flaps are not going to get it done, that's how high I was. So I put it in a big honking slip, didn't think about it just did it. Landing and roll out went fine, but something wasn't right, can't explain it but I never did it again, and I was shaking when I got out of the cockpit.
1. Read the POH
2. Practice first at altitude
3. remember what plane you are flying

SF