Hello, I will try to make this project not so easy as there is little help in terms of "goodies" proposed in the modelling market.
Normally this is to achieve an AH-64A upgraded as for the D to the equipment level.
Peten is the name given to the AH-64 A, Matrix is the adjective given to the upgrade version.
There will be a lot of appendages on the model, first eliminate everything that does not fit and start to put the bases of the different elements to apply on the fuselage.
Faded or missing rivets should normally be completed with Micromark decals, it will be long and not so simple, to start with the rear rudder.
Small parts like the controls to start smoothly.
Babs.