If I'm going to have a big expensive model, I'm not going to limit myself to just one build!
https://streamable.com/7oz2q
Here’s an album of where I placed the magnets.
https://imgur.com/a/3AAYY0N
AMATEUR TIP: use a sharpie to mark one side of each magnet so you always have them oriented the correct direction.
This was surprisingly simple. For the head and left arm, the body has little nubs to help line up with the arms, so I simply screwed holes where those nubs are slightly bigger than the 3/32 x 1/16 magnets and slid them in. On the arm/head side, I put the magnets in the divots where the nubs should go, also drilling out a large enough space. I did two for the head and ended up with three for the arm, because the nubs/divots were both on the bottom and the arm didn’t sit right.
The right arm is nowhere near as elegant. You’re just left with big empty spaces, so I filled the arm and hands with greenstuff, using a little superglue on the interior, and squished a larger magnet into both ends. After the glue was set enough, but the greenstuff was still malleable, I test fit each arm, squishing it all together so it would harden flush together.