I disagree, at least for performance fit. If a boot starts too big(long or wide) you are a bit screwed. You can get extra thick intuitions and stuff, but it still won't be top performance. I think you meant making a boot that is too skinny wider, and that is easy and a smart way to go. I almost did that with FTs, but then realized solly Falcons fit my foot out of the box amazingly, have a better flex(stiffer, and IMO smoother) and I may be alone on this, but I don't like FTs flat bootboards(no slope) or buckle system.
To the thread maker, get fitted, but IMO Sollys are best. They go from shells widening 2mm each(falcon(98)-impact(100) and some 102 and 104 and SPKs) so most likely one will fit you well. Also some have "custom shells" that mold(widen) in the forefoot for more exact fit. I didn't use it on my CS Pros because I don't need them wider, but it would be worth it for many people. Make sure you first get good footbeds with any boot(all stock suck badly, I recommend SOLE ( yoursole.com I think)) then secondly Intuitions(BTW, all FT "intuitions' aren't the actual quality of intuitions from intuition directly, and Dalbello's intuitions are better than FTs, but again not 100%).