Not exactly sure,
Just looked at setup, why do have the length as 100 pixels and also 50 pix?
Why not setup each universe for two strings (as each only has 100 pix in total)
Thus use only half of the settings and each setup would be start:1-1 100 pix u2:ch1, 1-2 100 pix u4:ch1,
1-3 100 pix u6:ch1.... etc
And change the setup tab in Xl to reflect the actual number of channels per universe,
start u2 ch300, u3 ch300, u4 ch 300, ......etc
Cheers and hopes this makes sense and helps
Boof63
pps shouldn't need to have zig in their either as node layout should reflect the real world ie left to right for each string