As long as it isn't being relied on for daily transportation, it is a discretionary activity. Always just remember that the work on the Firebird is supposed to be fun and a hobby. I found that if I start to get frustrated with it, it's time for a break, maybe even for a few days.
I've stepped back for a couple months now on one of the projects on my Bird. I had struggled with a bolt for days and got frustrated by it. I've chosen to shelve the project for a while and let occasional blasts of PB Blaster work.
