I retired on 31 Dec 2011, the interim check was appx 80% of the total amount ultimately due me with no state tax witholding or witholding for medical/life Ins.. I was not aware of the gotcha regarding the interim payment and it not covering bought back military service on the short term. It's just another way to screw us just abit longer.
Retirement....I HIGHLY recommend it!!
My understanding on the health insurance is that the government pays their share and holds back yours until you start getting your full pension then it comes out lump sum when you get the percentage they have been holding back.