2.5 hours is pretty long to go without a break.
Maybe shorten your workout with breaks in between.
I did learn on a Frankenstein bass from an older friend .. and the action was so high you could slide your pinky in. Maybe that made me a very hard player and hence the slight pain. (this is what I feel is the problem)Get your basses set up. Also, technique goes a long way! You're probably playing too hard.
I did learn on a Frankenstein bass from an older friend .. and the action was so high you could slide your pinky in. Maybe that made me a very hard player and hence the slight pain. (this is what I feel is the problem)
Here's a thought: When you play the 5-string, do you tend to play higher on the neck than you do on a 4-string? That's usually easier than playing down by the nut, and a lot of folks like fivers for that very reason. Also, if you aren't careful about maintaining a straight wrist when playing on the lower frets, which is hard to do, I think this would explain why you're experiencing pain in those two fingers.
The wider neck of a P-Bass takes a minute to get used to. If you try to muscle it, you’ll lose. Set-up is everything. I always know when the neck needs adjustment. Instruments have their own internal tempo. The P-Bass is at slow end, for sure. They need patience to play.