Don't worry about the 50hz. The logger has more memory and its recording algorithm is changed. I use the brushless sensor, temp sensor and gps for a whole pack and still have space after a pack.
6 KiloWatt A123 Racer
GTP-Pletty Big Maxximum+RX8. GTP-C50-6L Hacker+RX8. CRT.5-Pro4+ZTW esc.
24s2p EVG SX 49.6mph Ebike.
18s4p Raptor 60mph Ebike. 11.5KW