Using Public RTK Tower

Good day

I am using a drotek DP0601 RTK GPS for my drone in the hope of getting very accurate position estimates. There is, however, the problem that you have to leave the base station at the desired location for a long time to get the high RTK accuracy (or that is how I understand it). With that, I thought that I could maybe use my local RTK base stations (we have TrigNet here). Does someone maybe have experience with using their local base stations and know if it is possible though QGC?

With this being said, for my specific application, I am not as interested in my absolute accuracy, but do require the high accuracy (of about 2.5 cm) advertised by RTK GNSS relative to my base station. At this moment I do not seem to get it, with my local position estimates drifting drastically. So if there is someone who knows how to get those high accuracies out of my RTK and what setup I must do, I would greatly appreciate it.