Quote from byteme:
To answer your question about what's important: what's important to you if you are an end user?
Quote from crmorris:
is your spreader boilerplate? if it's passive, leaning, can work multiple legs, and can spread multiple instruments (ratioed against an average, etc), then it might be useful.
most are paranoid about others software (as you yourself were apparently). i'd worry about proper error checking, user input prevents, and things going haywire.