Every time I come close to upgrading the performance of my Z I hear negatives. First I decide to have a ripper installed and I hear about noise and vibration problems,so I don't do it. Second I decide to have a bottom feeder installed and I hear about water sucking problems.And most recently the PRT longevity and drone issue. The 3 most important performance mods seem to risky!!! VERY FRUSTRATING!!! LES/FUBU69