if it is balanced before then it will be balanced after. your wheels dont need balancing every time you take them off. As long as you mark the nut, shaft and compressor housing, so that you can assemble it in the exact same place as it was before. Measure the shaft and see if its worn. Turbos are balanced outside the cartridge, dissassembled, then re-built inside the cartridge. so therefore why cant you take it out and re-asemble it yourself? It just needs to be kept inline thats all.