I have been playing around trying to figure out how to model an up-and-over type, non-RGB megatree and I get regular crashes. Working on a completely new show folder and a simple network, new sequence with just one model in it. If I define the tree first as a single color, 16 string, 1-strand per string 360 Tree there's no problem. I can place effects on it. If I define it as a single color, 16 string, 2-strand per string 360 Tree, it will create the model and grid (though the grid shows 32 rows), but as soon as I attempt to place an effect it crashes. If I take the 1-strand per string model with effects already on it and convert it to a 2-strand per string tree it will crash upon exiting the model dialog. There is no problem doing this with RGB strings, just single-color. One thing that stands out is it seems that there should only be 16 rows in the grid, or that somehow the second 16 should mirror the effects placed in the first 16.