So, I removed my FSB from a factory med-length upper after making a few marks with a pencil to get everything lined back up after replacing the handguard cap with a round unit to accommodate a Magpul SL handguard.

After some handling and removing the FSB and trianglular cap, my marks are pretty much obliterated. My question is: Will reinstalling the taper pins pretty much automatically align the FSB to its original position due to the nature of the tapered pin arrangement or is that not necessarily the case?

I found a number of videos on YT about removing taper pins and even reinstalling them, but none really seemed to mention realigning the FSB/gas block...