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The biggest issue is going to be "locking" pieces so that they hold a pose and don't sag or rotate out of position. That probably means a combination of magnets and pinning or multiple magnets per joint, rather than sticking in the largest magnet that can be hidden within the model.

Michael Kan has a page about assembling one http://kan.org/michael/mkp/tyranid_hierodule.php, and he has magnetized other models, so it might be worth asking him for advice. I know he's on Dakka - just can't remember his user name.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/343307/2390381.page http://www.dakkadakka.com/dakkaforum/posts/preList/343307/2390381.page GMT http://www.dakkadakka.com/dakkaforum/posts/preList/343307/2390694.page http://www.dakkadakka.com/dakkaforum/posts/preList/343307/2390694.page GMT