I don't know what the build manual of the Carson loader looks like, or if it's even in English, but pics usually say more than words, so study them carefully.
Look through the entire manual thoroughly before starting any building, it might save some dismantling time having to take some part of an assembly apart to get another sub-assembly to fit together.
Most guys put the entire model together before any painting to check fitment of every part & to be sure every part is included with the kit. Then it all apart & paint it. That may save ruining the finish when you'll know how exactly how it should go together again.
Spektrum radios are not by any means price competitive to some other radios that may work equally as well, but they definitely rank in the Top 5 for the simplest to use & to program. The DX9 would be the most diverse in the Spektrum line up be it truck, loader, excavator or whatever model you dream up on your own, one radio for everything, just buy additional receivers.