Hi BoBo
Losing weight as a type 1 is hard, and no one teaches you how to do it. Lots of T1s put on weight uncontrollably, or can't lose.
The trick is that you must reduce your total insulin, particularly basal insulin. Low carbing or dieting on its own won't shift it. Unless you reduce your total insulin first, (by a small amount, then progressively), you will get hunger cravings (from falling blood sugar levels) and/or hypo. Either way you will eat carbs to satisfy the insulin in your system, and you will not lose weight. So the solution is to gradually, progressively, step down your insulin. Then at the same time do your diet or exercise or whatever to lose weight.
You were diagnosed in 91 which was a few years before me. So maybe you are still on a long acting insulin only? Have you switched over to a basal bolus regime of fast acting for meals, long acting for the rest of the time? Have you done carb counting for bolus doses? These things will help a lot, both with weight loss and in general.