As it looks now, the currently gallery system will be replaced with a new one next Friday. Timing is not exact yet, but during the conversion, the site will be taken offline for the operation to go as swift as possible.
There will be a "site maintenance" warning of course, but I just want to inform you ahead of it. There's some minor work left but next Friday looks likely.
In any case it will be done late/early GMT time. As of 0:00 until it's done that is.
Note that this is a first of several upgrade steps for f1t. The gallery is just an architectural improvement to increase performance.