Update:
The LST seems to have worked fairly well. I am keeping the Canopy within 4" of the screen. It is also starting to show some success with the number of tops forming. Here is a pic of the whole thing and a couple things for perspective. The trimmers are standard Fiskers.
This is the best cola I have right now. The Little Mutant has two like this which is why I am liking her even though she had a slow start and only has 5 tops compared to the other larger plant. The larger one is only going to be popcorn buds though. It may produce more in the end but it will all be small stuff. That doesn't really matter with this grow since I am just getting the setup working and trying to dial it in for future grows. Everything is working well with the lighting and ventilation (temps 27 Celsius, stable) so I think the whole grow is a success regardless of how much I get in the end.
Colour is nice with no signs of deficiency or nute burn so that is making me very happy.
I am starting to slowly increase the amount of nutes in the water. I feed every day so I keep the concentration low. I don't have a meter so I have no idea what the PPM is. Right now I am using a 10-10-21 so I have to be careful of how much I use.