I had the springs replaced on my 85 Vmax before I had found this sight and they used stock springs. All of the seal etc are new. Would I be able to just change out the springs with progreessive type? If so what oil and any other things will I have to change? And last can I do this while the forks are still on the bike? I am A heavy rider at 260lbs. Any suggestions would be helpfull.:confused2: