I saw your first photo and thought, "That looks just like mine." '85 Sovereign
, 25', that IS just like mine!
Anyway, I see you left one of the old banded elbow connectors, and am guessing you left the ones we can't see. Let me assure you that they will blow apart at some point. It is best to replace any and all such elbows, tees, and valves.
If it sounds like the voice of experience, I am afraid it is. I went ahead and replaced the tubing also, because the tubing is cheap. It is the connectors that cost. And coiled tubing allows you to sometimes eliminate an elbow.