rEvo II and rEvo III Work of Breathing

[Deep Thought]

I just received my second rEvo and showing the changes in the physical shape of the breathing lung area, and the diameter of the ports for breathing hoses.  Although I have been in extreme current on shipwrecks and caves, I have never had an issue with breathing resistance on the rEvo II.  I am interested to see if there is any noticeable difference in breathing effort?  I will have both of these rEvos with me at the Free Rebreather Demos that I will feature all over the Midwest this Winter and Spring. Check it out.

Ron