Welcome my friend, you need not give us a background on gundam, though it is welcome, you will find a few, including me, that know more then enough about the series, it's mechs, and its backstory.
and since you said it. Gunpla short hand for Gundam Plastic Model Kit.
your RX is going to have some competition in a little bit, just got my Zaku II 2.0 in the mail today, just waiting on some supplies before I start her, and yes, I am a Zeon supporter.
SEIG ZEON!
also, welcome, good to have other gundam fans here.