Maybe adding more pics to this discussion will help. You can add one per reply using the browse button.

Hey Canuck, I personally think you are better off buying some dwarf or ultra dwarf citrus trees. You will have fruit sooner and the size will be more manageable for your space. You most likely won't have to worry about pruning either. I am guessing that those seeds are from a standard sized tree rather than a dwarf. Did you know that it typically takes 10+ years for a seedling to bear fruit? You should be able to get dwarf trees at Home Depot or Lowe's for under $20.00. Good luck and have fun!!!

How narrow do you need? Cultivars like Skeeter's Broom are small and stay relatively narrow: https://www.mrmaple.com/Buy-Acer-palmatum-Skeeters-Broom-Japanese-Maple.html I've also seen some very tall staked Ryusen that look columnar, but of course they're just staked and weeping.

^ Bingo, thanks!!! Sideroxylon lanuginosum aka Bumelia lanuginosa... And wow, can't wait to try some of its edible berries later! One-inch-long, oval, blue-black berries ripen in the fall and are a good source of food for wildlife. The fruit, which matures in the autumn, is a small oval black berry containing a single seed. It is edible even for humans and is consumed by birds and other wildlife.