OK lets sort a few things out for you both
Firstly Canad420, your girl needs 2 main fans removing asap. in your above pic you have 2 top fans sat pointing back into the center of the plant, these over shadow the new nodes were wanting to grow out for limbs!
we repeatedly remove these leaves every time they repeat along the flux. I nip off leaving a little stem stump. this later becomes a little anchor point for the tether as you move them along.
As for anchoring etc. I'd still go like I have with garden canes, you may need thinner ones as your so close to pot rim. This lets you veg out way past the pot rim for more limbs and more colas etc.
With fluxing you do get a longer veg, so theres a tipping point as it were. You need to get a certain number of limbs to make the pay off for the extended veg worth it at the end.
My current girls are both in 5 gal pots and each end is easily over 6 inch past pot edge. I've topped one but left the other going for still more limbs.
Obviously its up to you and depends on what size flux you want? If say 8-12 limbs you may be ok, if more then we need to expand your tether points some how!
Med my friend
OK ill find a couple of pics out of my original again. Then tomoz ill get some detailed pics of my current pair of fluxes. Ones a right mess as Ive basically forgotten em all whilst working.
For when to top? We top the ends when were almost happy with the base framework size. We think ahead and try to time it so were just getting all finally set, yet the topped ends have time to mature into separate limbs to be spanned out just as all other limbs. When were in final phase before going vert we map out all sites into maximum spacing and get everything totally even.
Oh and my bubba for the video flux is in dirt and should pop over night!
Anyway some pics showing the filling in of center and the way I split the ends and mapped out my big girl
then we stack them nodes up with the opening up technique