Love the colour combo! What is the brand of filament you are using for that darker/richer pink?

I might do that, what size magnets would you want? Also, have you seen any models that have done a really good way for how the magnets attach?

I would just use some small round ones. Embed them in the print itself. setup a pause in the splicer after the layer is reached for the magnet to be inserted. Then you can set the magnet in and press resume on the print and it will cover it up. ( although , add a comment to make sure people use superglue on the polarity that will stick to metal to prevent the magnet from jumping up when the print head moves over it. but that is simple enough to do )