I have a pump, but I haven't got any extra weight on me....I had my pump due to high's each morning and low's, although my HBA1C was quite good the fluctuations in my levels were awful.
Anyway, my experience of a pump is:
A lot more work than MDI to be quite honest, at the moment I haven't got the elation that alot of people have regarding their pumps, but I can see some benfits in my levels. However, I put the beneift in my levels laregely down to the fact that I am testing a lot more and amending my insulin a lot more.
Pumps can only deliver a certain quantity of insulin, I don't actually know how much the maximum amount of insulin is that it can deliver.
To get pump you have to be able to show that you can carb count accurately, and that you have tried all methods of MDI, and that you can basically be a winner on a pump and not a giver upper. PCT's have to be confident that you want and can be able to manage a pump, as they are so much money. I do not know of any GP that has given anybody a pump, I though that this need to come from a consultant at a hospital-but I may be wrong about this.
You refer to having talked to your GP about a pump, are you under a hospital care team with your diabetes as well?
Weight issues will not necessarily be a reason to get a pump. 130 units is a large amount of insulin, how much grams of CHO of food are you actually eating a day?
There is a lot of issues that a consultant would need to take in to account before consideration of a pump for you, and especially if GP is talking about an operation that may affect the foods that you are eating as well.
Pumps do give better stability to levels, but they are not a quick fix solution, and the testing and altering of basals and bolus have to have some thought and determination to manage them. It is not a magic wand, but with good management of it, it can improve our levels.