Gunpla doujin sample

My very first try in drawing a manga in A4 size after a good lecture from ... an unnamed source. (if you guys didn't notice, it has always been A6 or lower.)

Plus it's my first try in drawing a proper mecha/Gundam (yes, God/Burning Gundam back then didn't count because it was only a head shot.)

Need some feedback on this before continuing, a good run over of the mechs will be great.