It seems to depend on your LF II - some have really "bendable" tubes, some dont. But there are people on reddit + co. displaying their builds with LF II "bends" in the meshi, clearly showing it even works with the 4 slot option (alas, ITX board).
My test "bend" over the top spine worked out really well, the cpu block would have fit perfectly on the mb.
In terms of size: The Meshroom S is next to identical, but the panels are slightly "raised" / "bulged out", so they allow for a few more mm to each side. The LF II 240 is actually 138 mm, so you would have a clearing space between them somewhere around 7 - 10 mm.
Re: Meshroom D - the reviews I've seen so far are calling it rather .. mediocre. I'd go for the C4 v2 or just the SAMA IM01 (or a licensed clone). Esp. the last one is such a joy to build in. Not much in terms of cable management, but if you plan out things well, its ultra-versatile, and you can also reuse lots of stuff meant for the NR200P. Eg. I got the Coolermaster ATX bracket for the NR200 sitting around, which relocated the ATX PSU to the middle / mid section of the front, thus allowing for better access to ports on the mainboard and potentially improved wiring / cable management, too.
cu, w0lf.