After updating to your latest version (with keeping the settings), DNScrypt was uninstalled. A package, which I installed on my own over LUCI.
Is this the wanted behavior? I have to install and configure DNScrypt after every update then. 
Yes, that is normal. Only config files are preserved in a sysupgrade but not the packages installed separately. (Note that dnscrypt's config files should be preserved, so there should be no need to re-config)
If you upgrade regularly and have several installed packages, you could e.g. write a small shell script and store it in /etc/config so that it gets saved and you can easily run that after a sysupgrade.
opkg update
opkg install dns...Can you tell me what's the difference between LEDE master and LEDE 17.01?
Is one of them stable? Thanks. 
[quote="eggplanter, post:36, topic:316"]
Can you tell me what's the difference between LEDE master and LEDE 17.01?Is one of them stable?
[/quote]Both are stable for the user.
But 17.01 branch is the "official stable branch" that is slightly behind the master in development, and from which the 17.01 stable release will be made in February.
Currently there is no practical difference with R7800. Slightly different wifi driver firmware, but otherwise pretty equal.
Some people like the "stable version", so that is one reason why I build also that. Additionally I like to help testing the forthcoming 17.01 release.
@hnyman are the led's for this unit still unable to operate due to limitation of driver? I am potentially in the market for a router, and have been eyeing this one.
Any other things to know coming in?
Other LEDs work as originally intended, but as the wifi status LEDs can't be controlled normally, the wifi status is still shown via wifi on/off and wps button LEDs in my build.
Otherwise everything works as expected.
(and like I have said several times, the TFTP recovery mode into u-boot by Netgear makes a possible unbricking really smooth.)
Ah, so the actual 2.4 and 5.0 led's on the unit DO actually light up. They just do not "blink" to simulate load/activity?
No. The original wifi status LEDs are dark.
Got it, thanks.
What is needed for us to be able to add this support. Is it a hard limitation? Or just needing to take the time to map the GPIO or triggers?
It has been discussed in the other R7800 threads here, Openwrt and ddwrt. Apparently the OEM software controls them separately, not via gpio. Likely the support will not be added in near future.
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Hello again 
I use your great firmware with two R7800, one of them is a dumb AP and the other my router.
Sadly I have problems with roaming, my clients (Android devices, a macbook, windows notebooks) won't connect to the next AP. They get connected to one of them and stay with it.
Both R7800 have the same SSID and passwords configured. Following config is different on each:
Router: Connected to WAN (getting DHCP from ISP), channel 36 for 5GHz and 11 for 2,4GHz
AP: Disabled firewall, miniupnp and ddns (Should I disable dnsmasq, too?), channel 100 for 5GHz and 1 for 2,4GHz
Everything else is configured identical.
Can you give me some tips?
Google Wifi Roaming Aggressiveness Settings (ie, its your client devices configuration)
Assuming that the routers are connected via LAN ports, you should likely disable dnsmasq on the slave device "AP" and set it just to have DNS and gateway to the first main router. But I haven't tried multi-router roaming with R7800 as only have one. With my earlier ath9k WNDR3700s I also tried WDS configs, but I am not sure how that would work with ath10k drivers.
I think that it is rather typical that the wifi clients stay connected the device they first connect with.
You might ask this in a separate thread, as I don't think that this is device-specific.
That's normal. For roaming you should use 802.11r protocol.
Sample config http://pastebin.com/RxKg3php
Discussion https://www.reddit.com/r/openwrt/comments/515oea/finally_got_80211r_roaming_working/
Wiki https://wiki.openwrt.org/doc/uci/wireless look for fast bss transition options
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While at 802.11r, could you also add 802.11w luci option please?
I might, but so far I have not tried 802.11w.
But thanks for your 802.11r links. I got interested in 802.11r thanks to them and fitted my routers with that. And then went to implement the LuCI side of it. Right now the 802.11r config in Luci should be rather complete.
It is actually just the main flag plus two timeouts, right?
ieee80211w Enables MFP (802.11w) support (0 = disabled, 1 = optional, 2 = required).
ieee80211w_max_timeout
ieee80211w_retry_timeout
And apparently only works with ath9k and ath10k, right?
EDIT: looks like also mt76 and mwlwifi support 80211w in LEDE.
Yep, seems like most drivers support it
802.11r (and probably 802.11w) get native LUCI support in your firmware?!
Thanks nyman, you are awesome! This is the best LEDE version for the best router!
Please post here when the feature is added to a release.
And thanks dissent for posting the links!
I pushed the 802.11w support to LuCI master:
https://github.com/openwrt/luci/commit/4ddb6b28168e030263bc4ee7242880b8176637b7