Well, I'm here and have read the post, but barrel fitting is a precise thing and cannot really be tuned or adjusted properly over the net. The shoulda', coulda', woulda' things are just to sensitive and critical.
I will say that the barrel hood is a bearing surface on the inside of the slide. You will get some finish rub there, it's normal. Do you have enough clearance, well, that would have to be measured. Schueman makes a timing kit that can help with that, it's just a set of shim stock and a little tool. I don't know if he charges for these or not if you don't get a barrel.
There are a lot of things to look for. The lugs should be riding the slide stop the entire way, the link is there to pull the barrel out of lock up. Most factory guns and drop in's ride the link though, it's not right, but not unusual.
Is your vertical impact area true and square? Where are the back of the feet striking? That is important. What's the legnth of your barrel bed, what's the setback from the top of the ramp to the throat of the barrel? Do you have the proper gap or 'jump'? How much lug engagement on top do you have? Is there peening up there? What about the hood against the breechface? The sides of the hood? Is it square and level in the slide? Etc....
There is just a lot to look for and it just cannot be done here properly, at least not by me. That's why it's not the cheapest thing to have done by a pro, and a lot of them get it wrong.
I'm sorry I couldn't be of any more help than that, and I hope I didn't discourage anyone, but it is what it is, and I cannot make it any simpler, that's why I didn't reply to the post earlier.
Bill