thx for all responses. Allright, tried everything I could, again. It's getting better, but, not perfect. One of the problems is the guiderails, as it always bends a little when you cut plywood of 9mm thickness and the cut in the plywood is only 8 cm. I clamped it at three positions and thereby it is getting better, however the start of the cut still is slightly different from the rest of the cut. A little a 'round' start of the cut still. Mayby I also should try another blade (the default blade in the TS55 is the 48 tooth). By the way, everything is brand new, so, the blade is sharp. Maybe the special 52 tooth blade for laminates?