Need advice trimming fan leaves and flushing with pics

I am week 11, six weeks flower of very small CFL with 200 watts of light. I am going to let this ride for possibly three more weeks depending on the trichs(when I get a lens to see). My plant is fairly bushy. Top buds range between quarter and half-dollar size. The lower buds are growing but of course much smaller. I would like to think many of them can be more than just fluff given a couple more weeks... they all have nice trichs on the leaves, just smallish buds sites. I know there is a never ending debate on trimming no matter at what stage. I would like to trim some fan leaves if it is generally fine to do so. Most of my fan leaves are attached to bud sites so I it's hard for me to figure which leaves might be ok to cut. Can I simply cut portions of individual fan leaves to allow for more light to lower buds and that won't cause much stress? Is it ok to cut fan leaves of lower weak buds, or will that basically kill any real hope of them developing into something decent. Can I cut the larger top leaves that have turned yellow and wilted? I have been bending and tucking until now but want to provide as much light and air flow as I can for the home stretch.

Also, what are the signs to look for to begin flush so that you don't get caught still flushing for a week as the trichs start turning past their prime?