4meSM
Bluelighter
Personally, I've never bothered with conversion, but I do have very pure gbl. If you decide to do it, it's important to measure everything accurately. You need to add the correct quantities and check the pH at the end. If you add too much base or if there's unreacted GBL, you may need to add an acid to balance the pH. However, this step will produce additional salts, which will increase the mass of the final product (assuming you're planning to evaporate the water).