Hey, WVR. Welcome to the Hub and thanks for your feedback man. Appreciate that.
Regarding your main question.. there's pretty much a schism on this issue and I'm in the camp that says it's never too late. I mean, ok.. late in flower when they're not growing virtually rules-out most of the auxins playing their role with encouraging more top growth and wotnot.. but it's well worth it all the way through in my opinion just to get more light to more areas, and as she bushes out in the centre canopy.. to spread apart some of the colas so more light gets around. If yours are stretching now.. tie those gals down a bit at a time mate. It won't do any harm I assure you.
The penny really dropped for me when I learned that the auxin production starts with the roots, so if we bend a stem the roots are the very first thing to beef up to compensate. It's a bit like when people bodybuild.. no matter what part of their body they first workout.. their back is the first thing to start beefing up so that it can support the extra muscle to come. Same with plants it seems.
With autos, however, the real benefit is drawn when we start early because autos don't have all the veg time for the extra growing.
So far as supercropping.. it's not something I've ever tried (intentionally) so my only results were recently when I acidentally chopped the tops off of two girls.. and both REALLY compensated by beefing up all the stems like I've never seen before (I actually had to hack the stems down when chopping them as my Chikamasas couldn't handle them!!) .. but I ran into hardwater problems with those so I can't really say if it's any good or not. My first impression is that it COULD be a really nifty trick to force an auxin-shock and get really good yields.. but until I'm sure it doesn't just knock-out the yield I can't really say much else about it. Sorry pal. For a photoperiod strain I'd definitely give it a go as I'd have the veg time to repair in full.
Here's a bit of LST mini-porn for ya: she's an experiment to see what happens to autos in small airpots & being fed light every watering (a 1ltr one in this case).. and as soon as I started training her her stem fattened up nicely and, for a 1ltr pot, folks seem to think she;s doing pretty well.
And this is the only one I've never LST'd (same experiment)!
LST for the win man.
