After flying smaller quads for years and graduating from the ZMR, it's this quad that really helped me get a little more comfortable in the sky..It's actually been a bit of a long road with this quad - including multiple part failures and losing it once or twice. When i originally built this quad, it was everything in the list, except SN20a escs, a different vtx, and a MXK PDB OSD. This PDB was the cause of many issues for me later. After months of grueling trial and error, among this burning up one SN20a, (was just hovering about to take off, and it burned up, on 3s, that's why it has XM now) The quad would never fly without an oscillation. No adjusting of PIDS, mounting methods of FC, different props etc would account for the oscillation and i just couldn't figure it out. Then I moved to 4s, and when i got my first 4s, i found the oscillation became more even intense, and not only that, then my FPV feed would completely cut out. Adding Lc filters and caps did nothing for it, then replaced my VTX, and at this frustrating end i finally decided i must replace the PDB. That's when i ended up with the RROSD v1, and completes its current setup. Ever since then, I have gotten it tuned pretty much exactly like it, and it's really starting to feel locked in. This quad is like my trusty sidekick.