I believe the time has come to change the format of the "X-series" forum.
Here are my proposals:
1. Rename X-series forum to SAV Forum and keep the X3 sub-forum and ADD a X5 sub-forum.
2. Get rid of the X-series forum and have two separate X3 and X5 forums (like the 3 & 5-series forum).
3. Keep the X-series forum like it is.