I'll try and answer the questions above. First Twobobbwana, I will have ejectors. I already have them in the barrels earlier in the posts. I just need to bore out the receiver to match.

Shotgunlover, yes indeed the two holes are for the screws that hold the sear springs in place

Dumprat, actually the trigger guard above is grade V titanium 6al-4v but I am using the same 4340 for the guards and accessories. I do plan on using 4140 for additional monoblocs though to match the barrels or 416 stainless if I use stainless barrels. You really don't need 4340 for the guards and such but I thought it might match better when blued. I might switch though to 4140. It is easier to mill. The reason for the titanium is to make light weight shotguns. I will not use on DRs though.--------Bill