Sacra Frasca flowering

i got a plant off of a friend that was approximately 2 weeks flowering and just slightly over 3 feet (and FULLY rootbound)

after realising i can lift 99.5% of the dirt in the pot (literally) by hoisting by the stem, i transplanted to a larger container (3-4gallons maybe?)

its now in late week 4/early week 5 and hasnt gotten much bigger, yet the buds are filling in

its a 600w light, and is fed with kelp and bonemeal and a thin layer of castings on earth surface.

any advice on its progress or what to improve? (It smells great, so i know its gonna be a good one)
better yet, any approximations at what it may yield judgeing by its current state?

the last pic is about a week previous. the top bud got a heat/light burn because it was within 13 inches of the unvented light. that burn has now been overgrown by healthy new pistils

as a sative, it has at least another 3-5 weeks left in flowering. will it ever have another growth spurt?