Anyone using the Bionic pro V2 or Bionic Tech V2?

So my old chest protector wore out. And Fox doesn't seem to make the Roost 2 anymore.(joking) I've been wearing the Leatt Fusion 3.0 jacket, but holy cow it's heavy. I want to keep wearing a neck brace and was looking at the pro V2 or Tech V2 to wear under my jersey with an Alpinestar neck brace. They both look good but the backs look like they go down a long way, like maybe into the back of my pants.

Anyone wear either of these under your jerseys, and if so, what do you think?