I use my chubby 27.5er mainly for towing my lad around in his trailer. It’s come to the time of year where the slarr gets flicked up the front of the trailer pretty swiftly and a decent rear mudguard would be really useful. Problem is, the only ones I’ve found such as the SKS Velo 65, don’t quite go down far enough (think level with the axle), or are quite wide enough. I appreciate looking for a mudguard like that for a mountain bike is somewhat idiosyncratic but it would be really useful.
I found a few threads on mtbr where fatty riders had self-built/modified standard and motorcycle guards, but before I engage on yet another project it’d be nice if there was something off the shelf.