Are there any opinions on whether the mechanically dry sealed first stage (Tech 50D) or the silicone sealed first stage (VX10) is preferable? Are there any advantages or disadvantages to each? i.e. better at depth or certain temperature ranges. I dive with the Tech 50D but nothing very deep or colder than 45F. For what I do it seems like a great reg. Plus it is simple to service/repair. Bob Favorite RVT UC Davis VMTH UC Davis SCUBA The Octopus' Garden VMD 490 Instructor safety diver safety diver
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