Woody,
I have built 2 Model IVs both with some Speedster mods and it stumped me trying to advise as to what to look for. Then it occurred to me that having an Annual Condition Inspection check-list might help. If you could send me your email address by sending an "email" to me via the private message page on the forum, I could send a copy of my check list. You won't be checking everything, but you could scan the list for some ideas.