Q.Convert lemon to tree or shape bush
I have a lemon bush that does bear some lemons and has bad thorns! Probably about 8 years old, transplanted about 6 years ago. This year its limbs have grown fast and reach about 7′ tall. Must do something to control its size. Should I try to make a tree of it, or just prune and shape it to keep as a bush?

Yes, you can prune the Lime Tree to help control it's size and shape.
Here is a link with more information.
https://www.gardeningknowhow.com/edible/fruits/lime/tips-for-pruning-lime-tree.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/thorns-on-citrus-trees.htm