Went back to the FA frame, the other setup with my upgraded sear and hammer has some issue with sticking trigger....
Sanded the stainless barrel bushing(got rid of the machined mark), then hit that as well as the outer barrel/chamber with metal polish....
I have also ordered a TK grip from DenTrin, just waiting for Chinese New Year thing to go by.....if you see these pic carefully you'll see the stock grip have developed a crack near the screw....