We also own a 2010 Zinger 19RD. The only problem we had was with the original tires. Just after the tire manufacturers warranty expired, every tire developed cracks and had to be replaced at our expense. The only on going issue with ours is that you can not extend or retract the awning when the door is in its holder at the side of the trailer. The awning will hit the door in this position. I made up a different holder to get around this problem.
We loved our Zinger. No major issues. It was a great trailer. We had a mobile rv repair guy out at our site on Sat. We were talking and he said he has never had to work on them. I thought that statement said a lot since he's been working as an rv tech for over 30 yrs and had his own business for 2 yrs.