Has anyone had kiss apply the Syntactic foam to their rebreather ?

If so did any buoyancy change occur or did you notice from when the foam wasn't applied ?

How cold of water temp should have you dove your unit ?

Any dives below 50 degrees ? If so for how long ?

I'm contemplating purchase of a kiss rebreather and while I dive in the warm waters of Florida, I still dive at quarries up north, water temps definitely colder.