Coaxial connectors should be soldered. Keep an eye on your crimped connections as they're more likely to fail that with a soldered connection. I agree with Dave, that you should have a balun at the antenna. My Cushcraft 3 element tribander calls for a home made RF choke at the antenna end of the coax, and not a balun (although I think a balun would work just fine). The homebrew choke wouldn't require the purchase of a store bought balun. What does the Buddipole's owner's manual call out?
Let's try 17 meters, what do you say?
1991 FJ80 converted to an HDT with an A442, Safari intercooler, 3" exhaust, factory Toyota subtank, 3" lift, 285's, Warn 9500xi, rear drawer system, 42qt Engel fridge.