Makita Miter Saw Fence issues

A recent project rquired some very accurate 45-degree cuts, and my Makita sliding compound miter saw did the job, well, _reasonably_ enough, but it was next to impossible to get the cuts absolutely perfect. So I'm looking for advice on two possible solutions.
The first is the Makita fence. It's a single piece of metal that formes the fence, with a c-shaped curve to accommodate the blade. Mine seems to be a bit off, in that the faces of the two "fences" aren't co- planar. So, while I could set one side to be dead-on perfect, the other side will be slightly off. This was a problem when I tried to do corner cuts on some corner trim. I might be able to bend them slightly, but that won't be very precise. Would it be worth buying a replacement part? Or...
... I might try to build my own fence for my saw. And if i'm going to build one, it ought to have some things like stops, marks, and dead-on calibration. A breif web searech ahsn't turned up many examples, so could someone recommend a good fence design for this saw?
Thanks in advance.
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BrianSiano wrote:

It may be as simple as a defective fence. Maybe if you called Makita...
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Mine was off a hair as well. I had an acquaintance at a local machine shop touch it up on the grinder. A 24 pack of beer, and he go to keep most of them :)
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Same problem with my Dewalt. I used a pane of glass larger than the aluminum fence, with a few sheets of 80 grit sandpaper glued onto it. Layed the fence on the glass, and began to lap. Then switched to 120. Didn't take much time. Tom
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Good flat glass, of course. Tom
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I saw a fence system in the Peachtree catalog the other day. It provided two options -- an 8 footer and a 16 footer -- for, you guessed it, either a 4 foot or 8 foot extension on each site of the saw. Comes with a tee slot for hanging a stop block.
BrianSiano wrote:

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