In reference to the 'you need to polish your balls' remark to Phil. I actually like some of these little quips he makes in reference to what the celebrity is actually famous or in some cases 'famous' for. In Phil's case I basically think that Len was implying to Phil, that technically he is fine, all the steps are there and he's executing them well but in order to get the same sort of marks as your Ricky Ws and Lailas and Zoes and in the case of this week your Jades, you need to refine the dance by finishing lines, making sure your feet are closed, heel leads and coming up on the toes (i.e. the balls of your feet which I also think Len meant to advise Phil) hence the double statement of advice to Phil to 'polish his balls'. I don't think he meant it in bad taste at all.