I see tech divers from all agencies (including GUE) wearing drysuits made by many, many different manufacturers. DUI does not have anything approaching a monopoly on drysuits for tech diving... unless, perhaps, you are part of the WKPP. But I can't really speak to that.
There are reasons why GUE has a preference for the cave cut DUI suits, but I'm not aware of any hard and fast rules that say you MUST dive that. In fact, I know a few pretty serious GUE DIR divers who wear non DUI suits, so I'm pretty sure you're free to get what works best for you... AND your team.
There are reasons why GUE has a preference for the cave cut DUI suits, but I'm not aware of any hard and fast rules that say you MUST dive that. In fact, I know a few pretty serious GUE DIR divers who wear non DUI suits, so I'm pretty sure you're free to get what works best for you... AND your team.