No problem, that's why I put the thread up there to begin with, both to help someone with less experience, and to learn when someone who has more, asked why didn't i do it another way. The lighting mods all started by having crappy headlights and snowballed from there. I also wanted the ability to pull this stuff out of the truck with little to no sign it had ever been there.
When I started this project, I had heard about all the horror stories about people trying to dim their switch LED's as well. I decided WTH, I'd power my switch LED's, from the same dim-able LED circuit as the OEM dash LED's. It's worked like a charm. They don't go as dim as the factory lights, but they are a bit brighter on the high end as well. No noticeable flickering, and no issues with them to this point. It did mean running an extra wire, (from the back of the headlight switch to the AUX switches), but I think it was worth the dimming ability.
I mounted the relays to the front of the plastic tub that contains the PDC (fuse box) with short bolts (not self tapping). I unclipped the 4 tabs that hold the PDC in place and that allowed me enough room to get behind and tighten the nuts. I also used as large a washer as i could to keep the pressure on the plastic to a minimum. I used a right angle drill, (one of the best "specialty" tools I own), and a sawed off drill bit to drill the holes. A standard cordless was too big for everything but one of the center holes. I don't really know, but I don't think you'll have any more room with the 2500, the dimensions would be that same, no?
I work as a project manager in the oil industry, so am used to coming up with creative solutions to operational issues, and yes, K.I.S.S. is always the best advice.