How feasible is it for a regular person to do an S5 SC install? I don't care if it takes me a couple weeks. I am no mechanic but I can take things apart and follow instructions. So far I've done mostly small mods myself: JHM short shifter (take out entire center console), auto folding mirrors (take apart door, A pillar), radar detector (take off front bumper cover, route wires through ECU box). Most of that was pretty trivial of course, at least compared to taking apart the engine. 
I haven't decided on a kit. Does a particular kit have better instructions? I guess I would need instructions that are not vague and have nice, detailed steps.
What are the hardest parts of doing a SC install? Are there any gotchas that could cause problems for a noob? Are there special tools involved? Are there steps that are best left to professionals (checking for leaks or something)? Could I do the install and take it to a professional for a final look over or only if I have problems?
My motivation for asking about this is that the SC is very expensive so a DIY install offsets the cost, and also that I enjoy tinkering with my car and I've pretty much run out of easy mods.
I haven't decided on a kit. Does a particular kit have better instructions? I guess I would need instructions that are not vague and have nice, detailed steps.
What are the hardest parts of doing a SC install? Are there any gotchas that could cause problems for a noob? Are there special tools involved? Are there steps that are best left to professionals (checking for leaks or something)? Could I do the install and take it to a professional for a final look over or only if I have problems?
My motivation for asking about this is that the SC is very expensive so a DIY install offsets the cost, and also that I enjoy tinkering with my car and I've pretty much run out of easy mods.