Thanks for the tips everyone. Just using an extra null to host the ice tree seems already to fix my problem.
Raff : Avoiding local kine make sense to me. I always use Globals when I write SCOP so I should be safe. Thanks for the confirmation. Ahmidou : I'm a bit confused by what you say. The test I want to build has a hundred of outputs, but I only want to compute some data once... I'm wondering how I will need to tackle that to keep the speed high. I'll give it a try first ;-)
