Anna One, Anna Two...
Full-length Guide Rods are an unnecessary affectation on most
1911s. They do help smooth out the cycle and keep the slide tracking straight on badly worn pistols...a little...and they prevent the spring coils
from making contact with the end of the stub guide rod on a gun that has vertical play that's off the scale...but that's about it, other than providing a more "finished" appearance.
There are some who can tell a difference in muzzle flip with a FLGR, but I've
never been able to feel it unless a heavy tungsten rod was used...and only
very little with those. I suppose if one is speed-shooting, every little bit helps get the gun back on target, but in a practical sense, they're not worth
the effort or expense.
One and two piece rods have a penchant for coming unglued/unscrewed
at inopportune moments...as in when you least expect or need it... and are better left to the range toys and gamers<----IMHO, of course....but the dictum that states: The more gadgety it is, the more Murphy it gets"
applies in full force.
Of course, a true one-piece solid FLGR won't give any more trouble than the standard "stub" type...but I've never seen one of those. Even a one-piece rod is two-piece. Look closely at the head, and you'll see that it's either pressed or threaded. If you simply must have one, I strongly suggest silver-soldering the rod to the head.
Luck!
Tuner