The electrical design of Airstreams was controlled by the acounting dept not the engineers. Well that's my view. The good news is that anything made by man can be improved or modified by man.
I try to learn by the success of others who have an excellant history of success.
The aviation industry does electrics the best. A change to circuit breakers is my choise. I have divided a couple circuits and added a few circuits for the 12 volt
power. The modern blade fuses are very easy, of low cost, and available about every where. An amp is an amp. The voltage is not critical, as I have used 24 and 28 volt aircraft breakers with no risk. There are fuse strips available from many suppliers.
Many times when the glass fuses are good the circuit does not work.