Using A DTR and pumping at the same time

Hello all. I am currently using the DTR ( its basically a device that stretches your skin so you can eventually cover your glands for extra sensitivity. Anyway.. This device pulls your shaft skin outwards, while also pressing it in, basically compressing your penis.(for 6 hrs 5 days a week) I am really wanting to start pumping, but I think having a routine where I do both would result in no gains from pumping as the DTR would press all the fluid out of my penis.. Does anyone have any experience with this? Suggestions?

Thanks in advance!