You're making more out of it than needs to be. This isn't permanent, this isn't archive quality, this isn't anything other than an experiment - pure and simple. If I wanted something fantastic I'd go out and blow around $10K on a 1Dx along with $20-$30K on a bunch of high end EOS lenses. Not everyone has a bunch of L lenses, not $150+ to throw down on converting a bunch of lenses you don't want to convert, nor a bunch of cash to burn on a hobby that is not generating one cent of income. I may also have a chance to borrow some lenses from a friend that still has a F-1 in addition to a 5D3, he may let me borrow a lens or two but I'm betting he'd beat me senseless if I modified them without his permission. Any testing has to be non-destructive. I happen to have a A-1, a AE-1 Program along with a Yashica TL Super I shoot with at times. I have lenses I use on them but a differing focal lengths than the kit lenses that came with the T4I. I want to know the 'what if' I try something.
I AM DOING SOME EXPERIMENTATION - that's it. I have a bunch of lenses with FD mounts that are different lengths that the ones I have with DG and EF-s mounts I'd like to play with. I do more landscapes than anything else, so I have the luxury of time to play while working through focus and settings.
I'll blow you even more: I have a number of El-Nikkor lenses on an Omega D5V enlarger. If I could figure out a way to mount them to the camera body, I'd love to see what they'd do. I recently saw a YouTube where someone mounted a 100 yr old lens on a digital body.
If you want to convert some FD lenses to work - go for it. I'm not going to knock you. Want to spend $5K on a lens, if you have the cash then go for it. Nothing will ever progress unless people try new things. I'm trying something new. Try a Minolta on a Canon - worth a shot. What about a Zeiss on something - if it fits then why not try it? It's all about seeing what's possible or not.