Wow, you only have around 500rounds thru it in 20years?
I wouldn't even consider that broken in yet. In all honesty, if it were mine, I'd invest in a good BarSto match barrel and barrel bushing, fitted by a good 1911 GS. You won't find anything else that will match it for accuracy vs. $ spent. Shouldn't set you back more than 3 bills or so, I'd guess.