LST can really be done any time it's needed - the exception being if they're too young (i.e., before they have 3-4 nodes). I've had to do LST on my Tangerine Dream as late as 3 weeks before harvest! She was going to tear therough the top of my tent if I hadn't!
When the LST has been in place for a while (couple of weeks?), it will become permanent and you can release it and use the material (whatever you've used) to use it elsewhere...
Nice job, btw... the grow looks fab!