I guess the question now that it's all working, is why it (N4, not setups) takes twice as long to load a patch than Nebula 3?

My 4K Black chain (HPF, LF, LMF, MF, HMF, HF) takes 12 seconds to load using N4 and SetUps, whereas the same chain takes only 6 seconds using Nebula 3.

Any way to narrow the loading time gap?

Thanks to the forum moderator for making the above post a new thread, but please could the title be changed to "Why does N4 take twice as long to load a patch than Nebula 3?" The current title sounds like a reason/solution is available in the thread, which isn't the case.