Hi West
Let me tell you I can also get your CDI fixed and not so expensive. It's not just me, I have professional help.
That been said, the idea of a decent replacement pleases me, specially because I want to keep my bikes running for a long time ! You know that the repair thing it's not really a business, just small hobby, and there is a reason for that, these CDI's are not so bad, they don't brake very much. Not like the stators !! those are really bad !!!
The HPI or electrex replacement has been discussed a lot here (check older posts), the problem for me (from what I have understood) they only have one CDI with one advance curve, that I think it's most suited for the 450 ??
If that makes a lot of difference ?? can't tell
Maybe there will come a time that it's gone a be your only option, but for now I will keep using the old ones.
The idea of making the complete diagram of the CDI it's most interesting, if someone would be interested in striping one CDI completely and maybe ruining it. If that was the case, I'm sure I have the perfect guy to make the diagram, and even manufacturing other one, and probably improve it.
ZAGA