The RY comes with a complete hw pack typical of most chinese profiles. The tank is great to use, landing gear and wheels are pretty good. COntrol linkages are ok but there are dozens or more options for linkage setups and seems everyone has their opinions and preferences. Personally I like to use ball links on most models 90 size and up but that is probably overkill on a profile! Clevises and Z-bends are more than adequate. If you are buying a new engine the OS 91 is actually the same size and weight as the new 75AX so I'd go for the 91FX 2-stroke. I'm not a 4-s expert but I'd guess any of the name brand .91-1.25 4-s engines would be great power. Maybe a Saito 100 would be a great choice.