Hey bro, sorry been away for a bit. Yep, the claw is when the leaves turn down at the tips and is usually caused by over watering or over nutes
I think you'll do well with the T5 setup too, you could even swap out the bulbs and have 6x6500k with 2 flowering bulbs for veg and then do the opposite for flowering. My only suggestion with using T5's is to have the plants with an even canopy and not too stretchy, the more light you can get to penetrate the buds, the thicker they will be
that is my experience anyway. If you leave the veging bulbs in for the first week of flower they won't stretch as much
real keen to see what you come out with bro, best of luck hey!