Yes, I take it down to two leaves and defoliate, once a year, or every other year. That's about a million leaves and you need to be careful to not damage the bud in the axil, so it's slow. Alternately, I just take it down to two leaves. I work on it in autumn or winter in a cool greenhouse when I don't care what it looks like. It sort of has continuous growth so when there is not a million buds that need to be simultaneously expanded the leaves are bigger, (you can see this in the photo) so continuous tipping is part of the game. I've had it 15+ years and never a flower, but Keeping it tight enough to have layers and definition is the price I pay. I think. I don't have spines either and I think there is a correlation between cultivars that are more fruitful and spines and size. Mine is probably a dwarf, too. I had one as a houseplant a hundred years ago before I knew enough about houseplants to keep it looking nice enough for my wife not to complain. It had flowers and fruit followed around Christmas. And big spines.
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This pot is about 8 or 9 inches tall.