Thanks for the Reply, OK that makes sense.
If Admin reads this, this post could be moved to the General forum.

Picture Print using S3D on left and UP! on the right. http://i736.photobucket.com/albums/xx7/nz_andy/P1050267_zpsvb8cznqn.jpg Just a comment on the support generation, is it possible to set the support structure to change every 50 layers for example to strengthen the support structure on tall parts....

+1
This feature is also selectable on the TierTime insipre printer software also, so I think it should be an option with Simplify3D

Is the "first layer height" setting just for the part, or the raft also if it comes first?