If I Have Already Had a Mini-tummy Tuck, Can I Still Have a Full Tummy Tuck Several Years Later and Get a Good Result?

Yes. A full tummy tuck procedure can be performed following a mini tummy tuck. Consult with a board certified plastic surgeon regarding the severity and complexity of your case to determine the best and safest possible option for you. A standard (full) tummy tuck involves repair of the rectus muscles and removal of excess and loose skin in the abdominal region. A full tummy tuck improves the body’s contour and provides a tightened abdominal area. Usually, the same incision may be possible to avoid additional scarring.

It's hard to give you a good answer without seeing you, but I don't see why you couldn't get a full tummy tuck after a mini-tummy tuck.  As long as you have looseness of your abdominal wall and excess skin, you should be a good candidate for a full tummy tuck.

Yes, this can be performed - however, it is more challenging for the surgeon to tailor the skin, and to position the umbilicus without the need for a small vertical scar where the old umbilical site ends up.  There's typically not very much skin laxity centrally, but lots laterally.

It's better, in general, to do the full TT if that's what people need.