Sheath takes the 2.5, Paragon and Synthesis take 2.3Are buttons interchangeable between sheath, paragon and synthesis? I’m thinking of getting an orange paragon and a frosted synthesis and I want a set of black and a set of orange buttons for both. I ordered extra orange buttons for both my black paragon and black sheath, one is version 2.5 and the other is 2.4. I want to return both sheath and black paragon and gonna go with an orange paragon and a frosted synthesis and have them as part of my rotation along with my phone rebel.