editorial note: This was originally a post in the HF Technical Agenda discussion.  The matter of the amending or adding to the base library has come up a fair amount in the HF Technical Agenda discussion. While such changes are of course possible, I do wonder whether this is the best solution to the problems that users feel. Afterall:   changing base comes at a high cost to existing users adding to base comes at a high cost with respect to maintenance and entrenches design decisions (e.g. mergin...