Whether using a noose or clamp based extender, you should not be wearing it for anywhere close to that long at a time, I don’t think. Vacuum based extenders are safer to wear for extended periods like that, since they do not constrict blood flow as much, but a noose or clamp will hinder circulation to the glans. I have a vac extender (Penimaster Pro), and they recommend no more than 3 hour sessions before a break of at least 30 minutes to cycle in fresh blood and restore normal circulation.
I do not know the safe limit for use of your particular device between breaks, but I would be extremely wary of long sessions. Hopefully someone with experience with that device or one similar will chime in with a recommendation.
In the mean the, I would try cutting sessions down to an hour, then break for 15 minutes of light jelqing and massaging to restore blood flow.
Starting Stats Jan 2019 - BPEL: 6.75", MSEG: 5.875"
Now - BPEL: 7.0625", MSEG: 6.25"