Would putting an elbow on your filter, allowing you turn it sideways, let you raise your light more? As for LST, I put a 8 inch long pipe cleaner into the soil an inch or so beside my sprouted seed when planting her. After 4 sets of leaves develop, I start bending her over holding her down by forming the pipe cleaner. Once the axillary branchs start getting some length, I drop in SCROG net and keep pulling all the growing points down under the net until she goes into flowering, then let all the growing points start growing up in a flat even canopy. My tent is 60 inches tall, and this works good for me. I use 3 gallon pots and t5 lighting. Good luck with your grow, looking good.