Next week I'll get more info about 1911 Gold Cup National Match 38 Special that could be quite cheap. Since such gun has little value in my area, and I personally don't need it, what has to be done to convert it in something like 45 ACP, 40 S&W, 357 SIG, or even 9x23. A friend has National Match 45ACP barrel and bushing, can I use them for conversion? Another proposal for 1911A1 Springfield: could National Match 45ACP barrel and bushing be installed and can I expect significant improvement in accuracy? Thanks, Onty.