Your doing great lowering your numbers. However I have to take exception with your assertion that its meds that cause the loss of limbs. Its prolonged high BG that causes the complications. most people wait too long to go on meds, by that time the damage is done and thier already on there way to losing limbs.
Most important to staying healthy is controlling blood sugar.
This would be through a combination of low carb eating, exercise, and meds, if required.
Normal blood sugars are in the range of 70 - 120 all the time (3.8 - 6.6). It would be best if you can target this, or as close to this as possible. This would be the way to prevent complications.