I have been using my M5 since July... it came with two types of filters. Smooth and pleated. I had assumed the pleated was the "spring" leaf clean-up filter and the smooth was the fine filter for normal use... but the instruction book pictures (VERY POOR) seem to show the smooth filter as the spring leaf filter and the pleated as the general use summer filter. It is not described anywhere in normal words in the document. Can someone tell me which is which?