This seems obvious, but I seem compelled to ask it anyways... Can I assume that there is no point in adding any PAG at this time if I'm going to have the system vacuumed and recharged?
If you are replacing certain components Lotus has a published list of qty of PAG to add, ie. if you are replacing the dryer unit. Other than that, if you are having the system vacuumed/recharged by a shop, you don't need to do anything, they should add oil/dye as necessary. If the system was evacuated properly you shouldn't need any additional.