What is the quality of your Prime like? I've gotten 1 at Ross and exchanged it for another one, but both has several problems. On mine the back flaps, which form the truck's sides are very very loose, and one pops out of its socket completely. Secondly, when forming the front and hood of the truck the arms do not remain connected. The forward most connections constantly pop out. I have the first ROTF Prime and have not had any of these problems. Is it normal or am I just unlucky twice? Should I buy one at Toys R Us/Wal-Mart/ Kmart? Any help would be much appreciated.