Thanks! I really love giant robot cross-overs. It really is just pure mech-geek crack, storylines be damned. I think that's why I loved SRW OG: The Inspectors so much. They didn't care about the story so much, just on ensuring the mecha were awesome every single episode.
I had a 2nd or 3rd edition "Mazinga" growing up. Had him and almost all of his attachments up until my early 30's, when my young niece discovered him and spread his missals, swords, and his arm between three house moves. Miss him sooooo much. So, makes me like this even more!
Oh, you had one of the originals! Yeah, I remember those. I never owned one myself, but I had a friend who did. It was funny how so many of the chogokin toys from back then came with missiles and swords regardless of whether the mech even had them in the show. I know Great had swords, but Mazinger never did, stuff like that.
You could always do what I did and buy one of these: