Seems like you're almost there my man, i got 13 sd babys (clones) goin strong right now about 6inches or so, veggin for a little longer, takin clones n buddin through christmas in hopes of a true happy new year. I grew 20 sd plants outside this past summer and they were nearly hit by the first frost so what i say you do is test out one of your ripe looking buds, trim small piece, let it sit in the air for a day to get a bit dry, and if the top colas white hairs are 1/2 brown/amberish, i say its time to harvest, hang dry entire plant upside down for 2 days, trim main fan leaves (feeders) let hang 1 more day in good vented area then manicure your shit, let get a couple days of fresh air then can it. Hope i helped a little, gotta love the diesel, especially indoor

Goodluck