leon.
have you ever bought like 10 different kits and mix/matched parts together and created a beastly looking gundam?
Not really. I've bought kits from all over the place from 2002~2014, so a lot of the connections don't match.
Most of the customizing I'm doing require scratch-made parts anyway.
This would be the closest I've done.

Left is my nephew's; an Adele with a Build Booster. Right is mine; Wing Gundam with Wing Zero's backpack and wings, and F91's variable-speed beam rifles on it's waist. I also have Wing Zero with Wing Gundam's wings and a giant sword. It's weird how well Wing and Zero's wings work on each other. :x