A proper built wheel should not make "pinging" noises. Well, maybe the first mile at most, after that something is wrong. I stress-relieve then re-tension about 4x during a wheel build. In fact I use the pinging noise as an indicator as to when to STOP stress relieving! Only built two wheels, but neither made as much as a squeak after building.

I would say you made a good choice and gave the wheels attention now. Properly tensioned and trued spokes are a wonderful thing