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A possible solution to the dreaded pizza wheel problem (newbies go here to read about this problem) was posted some weeks back. Here's the clip from my posting at the site:-

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........................................................................... Pizza Wheel-Shimming it!!20 April 1999 Here's something from Chi Cheung on thePizza wheel problem- "As an engineer  by profession, I begin to examine the printer a bit more. I noticed that the star wheels are mounted on a sheet metal strip frictionally driven  by the rubber roller underneath it. I believe its function is just to guide the paper out and stop any side way motion. It also take the  paper out to the tray when the paper clears the printing head and main drive mechanism. They use starwheel configuration because it has the minimum surface area contact with paper. A rubber roller may sometimes smear the surface if ink is not dry completely. Solution: The way I did it is very simple,I loose the two hold down screws on both end of the sheet  metal strip and put a shim washer to elevated the whole strip above the bottom rubber roller.Just enough to lower the tension force so  that the teeth no longer have enough force to spike into the paper surface. I found around 1/32" shim works pretty good but again best to experiment with it. This method is totally reversible. Enclosed is picture of Shim washer. It's only a flat washer,nothing fancy.I slip it under the sheet metal strap on both side to lift up  the whole strap a little bit. In the beginning,I just cut a little square piece from my business card and stack about 4 together." Chi Cheung   The above is not a procedure for the technically-challenged. Newbies are advised not to try it as you risk damaging your printer. >>> Goes without saying that you use the above technique at your own risk and expense! <<<

• One user's experience..............................................................................

A reader has tried the above as well and has the following email to contribute:-
1"I tried the shimming tip and I wanted to share my experience. It's a bit intimidating but not really that hard on the 750. Took a total of 10 minutes. After removing the 4 cover screws, (2 in the back and 2 just inside the lift up cover), you can remove the entire upper case which makes placing the shims/washers pretty easy. Remove the 2 screws that hold the metal rail/pizza wheel assembly. Place one washer on each side under the assembly rail and replace the screws. No need to remove the rail, just lift slightly. I used small washers about 1/16 in thick. I checked the results before replacing the cover and it worked great! The wheel tracks are still slightly there but you really have to look for them. It's good enough! I did find, however that you must use the printer at the "+" setting or the moving print head will slightly rub the rail. Also the track marks are more apparent when set to "0". By the way, I'm using Epson's photo quality glossy paper. As far as voiding the warranty, this pizza wheel thing is a major problem and a design flaw as far as I'm concerned. It's totally unacceptable. What good is it to have great print output when prints are marred by the feed mechanism? The procedure is completely undoable. I don't see how anyone would know that it has been done unless you carelessly strip some screws ... I'll take my chances! Thanks for the tip ... it worked great." - Reader

Well, as and when I get more posts on this topic, you'll be sure that I will update this page...
For those who absolutely have to get rid of the problem..here's a link to Royce Bair's Tip

 

Cheers