Shoulder joint for eldar wraithknight

Why is the eldar wraithknight kit supplied with 4 arms, but only 2 shoulder joints - when it would make so much sense just to let people magnetise the shoulder plugs?!

So for modellers wanting extra options, these can be fitted with magnets on the bottom. You can then swap out arms as you want.

EDIT: A second version features a longer bottom section. If you print two of these long versions, and fit magnets to the bottoms, they should fit exactly and meet in the middle - providing a strong beam all the way through... so the arms won't fall off!