halocline
Contributor
Getting back to your original question about the differences between the C200 and C300, I personally don't think the user adjustment is worth spending a lot of extra money on. It is convenient for your alternate, to prevent free flows while you enter the water and get going. But, $475 is a LOT of money IMO for a first and second stage, especially a mid-level un-sealed diaphragm 1st and an unbalanced 2nd, even though it has kind of a fancy new lever that is supposed to improve the geometry of the reg. A somewhat similar reg would be the aqualung titan for significantly less.
The whole free-parts-warranty service bit is kind of a scam and SP is abandoning it anyway. And local service is convenient IF the service tech is good. Around here there have been lots of problems and it's outrageously expensive (at least at one dive shop). So, if I did not DIY, I would be sending my regs for service to someone else anyway.
I don't know what to make about your shop's remark "you can upgrade for cold water..." The rest of your quote didn't make sense to me, so I bet there was a little mis-communication. Basically, for very cold water, SP makes a reg similar to the MK11 called the MK17, which has a sealed ambient chamber. These are both 1st stages. Unless I'm mistaken, there is no upgrading the MK11 to a MK17 unless you replace it. The 2nd stage choice is not as important for very cold water, but that's a separate issue.
The whole free-parts-warranty service bit is kind of a scam and SP is abandoning it anyway. And local service is convenient IF the service tech is good. Around here there have been lots of problems and it's outrageously expensive (at least at one dive shop). So, if I did not DIY, I would be sending my regs for service to someone else anyway.
I don't know what to make about your shop's remark "you can upgrade for cold water..." The rest of your quote didn't make sense to me, so I bet there was a little mis-communication. Basically, for very cold water, SP makes a reg similar to the MK11 called the MK17, which has a sealed ambient chamber. These are both 1st stages. Unless I'm mistaken, there is no upgrading the MK11 to a MK17 unless you replace it. The 2nd stage choice is not as important for very cold water, but that's a separate issue.