I'm beginning to think that my string class is overkill. Simple things like strcmp() are a lot more involved than I thought since each chunk can be a different length. For instance, the following strings are the same:
"Hello___" " Wor____" "ld______"
"Hello Wo" "rld_____"
Despite them being different lengths and having different blocks and things.

I bet I'll finish it, profile it, and find it's total crap compared to std::string. Oh well, I can at least turn it into a wrapper class or something. Still, it's an "experience"...