So that’s the issue. I dive everything. Wintertime I dive in the Caribbean (or try) at least twice. Then in the summer I dive in my quarry/local. When I dive carribean I dive in my 3 unless I’m doing multiple dives then I use my 5 with aluminum 80. When I dive in the quarry I use my 7 hood and gloves and like to dive with a steel 120. 2 of the people I spoke with that are avid divers told me they dive aluminum backplate all year and when in carribean use a travel. With the wings, does it matter between the donut shape or the horseshoe?