Well I believe you have landed in the right place for support with building skills. There are some very detailed build threads in here like the current PIF build of the Sig LT40 that RcKen is doing right now. I personally don't have the building expertise & knowledge that you seek, but there are many here that do. When you run into a problem area or just want some advice about any stage of your build, just come in here & ask. I guarantee ya someone will have the answer for you. Good luck on your new build, enjoy it!