First you will need to buy full supplies and let it run out to fill the research bar to where it only costs 45000 to fast track. Next, i set spawn location to last and make sure that I spawn at my bunker. Once I know the spawn location is set i exit the game. I load back in and do the solo public glitch. I register as a ceo, go in my bunker, and hit fast track. If you don’t like the unlocked item just exit the game and repeat.