I'd magnetised the void shields on the carapace as well to make 'wounds' or whatever. The rest is left off for painting and none of it is load bearing so would affix easy enough with glue (shoulder plates will be pinned, you can see the pin sticking out).
I asked the guy for a photo when he was done painting it so we'll see how it looks once the trees are added; hopefully he does it justice (and sends the photo). I was excited to finish it but large swaths of airbrushing and the cost of this weren't really worth it in the end to just sit in a cabinet and not get played. Fun intense build though! (I must seem so fickle haha). I will have to consider it a backward commission - buy it, build it then find a buyer instead of the other way around.
In the first picture you can see some giant clamps holding the heavy arms together while the epoxy dries. Those were invaluable in the construction. I have some smaller ones too I use all of the time to help hold pieces together on smaller models. These are probably my favourite tools after a hobby knife and a desk lamp.