Trigger removal is sooooo easy. Here is a video to help. No need to remove the safety selector in your case though. Just pop the hammer and trigger out.
I had @MAC Defense do a 509 and Primary Machine do a Glock. Both were top notch work, but Mac is close enough to drop off for the work and was cheaper. Go with Mac.
I’ve used screw extractors with good results in the past. I’ve also heard you can use a rubber band depending on how tight it is in there. Lay the band over the stripped head, place the hex/Torx key over it, and back it out. I’ve never done this, but it’s worth a shot especially if the screw...
Is the bolt going all the way forward after the first round goes off?
The new trigger assembly fix they’re considering might suggest the hammer and disconnect aren’t jiving together. They can be binding up.
It is a great course. I was very familiar with the handgun prior to the class, so it helped out with the tear down portion. As long as you are proficient with a basic field strip you should be in good shape to get into the internals. Just be weary of those springs. I'll admit I shot one into the...