From the clara.io site, downloaded the dragon in .Stl and .Obj formats, to try out import of the two formats to Moi.

Results were similar. Joining took numerous seconds.
Stl had 37 joined surfaces, 450 naked edges in head/neck.
Obj had 39 joined surfaces, 394 naked edges in head/neck.

https://clara.io/view/b64d1057-9b13-4381-9674-4d91dd127f7f#

- Brian

(Still trying to puzzle out the scripts :-)