I've been running Tomato Shibby 1.40 on an Asus RT-AC66U for a long time. Specifically, tomato-RT-AC66U_RT-AC6x--140-AIO-64K.trx. Works great. That OS was released in May 2017, so today I thought I'd look around to see if there's something better. Looks like FreshTomato is it, but I couldn't install either of these: freshtomato-RT-AC66U_RT-AC6x-2018.5-AIO-64K.trx freshtomato-RT-AC66U_RT-AC6x-2018.5.083-beta-AIO-64K.trx They both misbehaved the same - when I rebooted after the install, they went into a loop of sorts, with a period of about 40 seconds. I kept a ping running from my laptop, and the router would respond to pings for 10-15 seconds, then the link would fail, then it would respond again, etc. The lights on the router would go through repeating patterns. So I gave up and reinstalled Tomato Shibby. Any help appreciated.