Sorry, but there is no such thing as letting a plant go too long in veg state. you can keep a plant indefinatly in veg, as long as you want. there is no difference in how old it gets. the pot size limits its growth size, ask anyone who keeps mother plants for years. And I hate to burst your bubble, but your not gonna get no 10 oz from that plant. your first guess was a little closer, and thats if grown optimaly. And dont weigh your buds till their dry, wet buds dont count, their all water. Plant height has nothing to do with yeild. Root mass does. roots = buds. peace.