I'm replacing the Reverb Pan/Tank in an Ampeg Jet II, and was hoping someone could help me with tank size. From the research I've done, I've narrowed it down to two options. I can use a Short (Type 8 - 9 inch) three spring reverb with a long decay or fit a Long (Type 9 - 18 inch) two sets of three springs attached to one another in a medium decay. Using a Fender Princeton reissue (Type 4 Long decay) as the benchmark, am i going to get closer with the Type 8 Long decay, or Type 9 with a Medium decay? I've heard that the 9's are pretty lush. Thank you!