Anyone know of a good machinist-type guy in the Colorado Springs/Denver area that could help me pinpoint my Saiga 12 problem?

It is about 98% but just needs a few minutes of tweaking to get it running right. I've tried every brand of mag, polished the bolt, sent it to Cadiz to have the gas ports drilled right... etc, etc. There is one place that could use a small tig weld to help the shells feed, and 2 places that might possibly need to be slightly shaped.

Thanks for any leads,
Tom