Hi There are thousands of Tamiya Tanks out in the world , Not one of them is the same as the next ,different paint job on all of them plus some will have built it and left parts off some will have added parts,some will have upgrades on , but none will be the same as yours ,if you line up all the Tamiya Tigers in the world you will be able to walk down and pick yours out, but a total stranger will think they are all the same.
So you have built a Tank ,even Heng Long tanks most of them are not as they came out of the box. If you have painted it and upgraded it its all part of the hobby,Getting it to work right is the hard part (Tamiya Tanks if you build it to instructions it should work) Heng Long if you upgrade its getting the upgrades to work together that can be a Dark Art. So if you buy a ready to run tank and just charge the battery and run it for fun its not a hobby its just a fun toy (some of them are very expensive toys ) .
regards pete