I tried the NoUSB Std K26 build on Linksys 310n v1. The only bothersome issue with that build is that the router would not reboot. When reboot is initiated, either via web GUI or via command line, the router goes offline, and the power button flashes continuously.
The only recovery is to physically power off and on the unit. This isn't a show stopper since the same K24 build is stable on 310n.