I read a lot about the S.P.E.C. or environmental kits that were available years ago for the MK5 and other Scubapro regulators. Does anyone have any experience using a MK5 / R109 in cold water without that kit? Most of my diving has been in the tropics, but recently my daughter moved to northern California and frequently dives in the Monterrey Bay area. I guessing the water there is somewhere between 40 and 50 degrees F this time of year. Would a MK5 require the environmental chamber to dive in that temperature water? Or would it be sufficient to fill the chamber with silicone grease? Or should I look for a more modern regulator that may be more suitable for that type of diving.
Any advice would be welcome
Thanks