Finally got a chance to listen. Not bad!
Actually whatever the flub was at the end wasn't particularly noticeable IMO, sure maybe it wasn't as clean and strong and together as it could've been, but I don't think it was noticeably worse than the rest of the performance. Actually, the only thing that did stick out for me was at around 2:30 (which admittedly is near the end so maybe that's the flub?
) when you (I'm assuming you're the 1st violin) seem to be suddenly playing a whole bunch of fast notes. I can't hear the notes clearly and they don't really sound like they quite fit with the rest of the music, it was just kind of strange. If I were just listening I probably wouldn't even take notice (as I said, couldn't actually hear those notes clearly anyway), but watching the performance visually it was hard not to take notice of the furious bowing at that point that was not matched by any of the other parts.
Overall, assuming that there simply wasn't much rehearsal time spent on this, it worked out alright I think. Out of curiosity, is this quartet thing just you and the other three rehearsing and practicing all on your own, or was there some sort of coach or teacher to help provide constructive feedback and technical advice?