No Mod. WARNNING: VTOL(Group 2) must be activated and set full power(with trim) for vertical T/O.//Tons of changes!!! 2/3 smaller version, easy to land on a carrier. Reduce number of engines from 4 to 2 while VTOL engines 2 to 1. Smaller, smarter, stabler. This version is designed as an attacker of request of Army. Commercial version has no weapon equipped except 2 mini guns. User is able to arm it at his own descretion, cockpit instruments has reserved for it.//Group 1 to start engines. Gr roup 2 to activate VTOL. Group 3 to turn on lights. Group 4 to arm guns. Group5-7 is modifieble.Group 8 is for RCNs. VTOL to adjust thrust direction, Trim to trim and adjust VTOL power.//Have fun and ONE MORE THING: Amazing cockpit!!! Beautiful and active instruments indicate thrust power/direction, VTOL power, landing gear condition and weapons, lights, ETC. Best cockpit you have ever seen, took me many hours to make it, download and try!!!