Mine has about 2 gallons through it with a YS .91 and no problems at all...
Yes, it is built light, and I did some strengthening in the landing gear mount, firewall, and a couple other spots, but I would have done the same with any ARF.
The covering on mine was pretty wrinkled out of the box, but tightened up nicely.
This plane is a great flyer, but IMHO an .82 Saito would not be all that exciting on this plane, which will come in ~ 7lbs. Geez, I was thinking about a Saito .82 for my 4lb Mojo!
It's not perfect, but for the price, I think this is a pretty nice plane, and it's a lot of fun to fly!