I figured it would need painting before full assembly, or it would be impossible to fill the spaces between the arms, gunpod and fuselage, or where the "feet" join the engine pods.
I already made a mistake due to the instructions' lack of English; I installed the blocks in the arms where the gunpod is supposed to join, and did such a good job that I can't cut them out again. I will have to sand the peg the gunpod joins between the arms down just enough to wedge in between them. Other than that, I may use part of the weapon set on it and use the rest on a Strike Valkyrie I may order in the near future.