In all honestly, I would love to be able to buy off the rack more often.
But finding a 48S with a 22 inches in the shoulders and a 14 inch drop is next to impossible, expect for the odd casual sport coat.
If you can get a great fit OTR...
If anything, this thread has convinced me to try Charles Tyrwhitt.
I usually go TM Lewin and Thomas Pink, but I can't ignore the good stuff I'm reading. So, I'm guessing the thread has had the exact opposite of the intended effect.