Hi,
Just wanted to share my experience with the Sekhmet 28mm gauge and my HM1000x. I know from experience that analog gauges are not as accurate as digital gauges (parallax, internal friction, inertia, hysteresis, etc) so I was pretty excited to get my Sekhmet. I found two issues; one, there was a slight leak. Two, it froze. They provided me with a replacement, which had the updated firmware, and that has solved the freezing issue. However, the new gauge also leaked. I used the o-ring seal under the gauge body as suggested, but I couldn't get it to seal completely.
It turns out that the nipple is too long!!! Upon removing the gauge and inspecting it, I found that the leading edge of the thread had stripped, and there was scratching on the aluminum where the v-block mounts. I did not over-tighten the gauge, so I have to think this is an engineering issue.
I'll communicate this to Sekhmet today, and see what they recommend. Otherwise, I'll just whittle it down some.
Geneeus