for a start i have to congratulate you on that fine looking thing...to be giving you advice is proberbly not right,but anyway here goes...
i lollipoped on my last grow(led) because my light doesnt penetrate that deep.it goes to maybe 8-10 inches so after tying her down for weeks i had a continues
flat canopy 8 inches deep straight across and yeilded twice as much GOOD bud as before(no small shit)
my advice to you,even though you are much more competent than i am, would be to figure out how deep your light penetrates(after 4 grows you should know)
and then trim all below.
good luck with your grow,even though you dont need it:thumbsup:

bigguy1977