Contacted the California based sales office of Hollis, and talked about the TX1. They had some measures for me as to the font size of the gauge display. So, my next step is to visit a store that has the TX1 on display. I need to imagine being underwater, with my gloves on, and attempting to push the buttons on the dive computer, changing from one gas to another. If the display is too small, or the buttons too difficult to operate, the dc becomes a bit of a challenge. Really !!! Hence, the Petrel2 is starting to stand out as the clear favorite.
In review,
purchased my Hollis SMS 100 side mount system with Reg Kit in 2014. In the closet now.
reviewed TDI texts and various articles/books on Advanced Nitrox and Decompression in 2014.
started to research in to Mixed Gas computer such as Hollis TX1 and Petrel2 for technical diving, 2015.
Oh boy, has it been slow.