Here's some pictures of my sks sight tool on a Mauser. Sorry about the poor quality of the pics. They got degraded some how and I have not bothered to fix them.
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Check this link out. http://milsurpshooter.net/reply/210575#reply-210575

That's a topic on another forum discussing front site adjustment. It has pics of a fancy sight tool, the author allowed it cost him about $50.

Then, just this morning I was looking at my Cheaper Than Dirt catalog and saw a sks front sight tool like I'm referring to here and it's listed for $5.97. Then on that other forum a fellow posted pics of a C-clamp he'd modified to do the same thing we're talking about here. They're good pics to see how he'd modified it if that's what you're wanting to do.