Yes, it is.
Thanks
Been investigating the forums, and basically came back with a few additional notes, and I put in setting locations, well as per latest Merlin firmware on an AC68U anyway.
So basically a more specific description of L&LD's work with some additional details.
1. Use the wizard to connect to your ISP.
2. Use new ssid's with 8 characters and without any spaces, special characters, punctuation or smiley faces for all bands and radio's (most likely easier to do after the wizard completes for dual 5GHz band radio's capable routers). You can reuse the old passwords though.
3. Disable media server - GUI > General > USB Application > Servers Center > Media server tab
4. Disable network share - GUI > General > USB Application > Servers Center > Network Place (Samba) tab
5. Disable NFSD - GUI > General > USB Application > Servers Center > NFS Exports tab
6. Disable FTP - GUI > General > USB Application > Servers Center > FTP Share tab
7. Change device name (if needed), set Force as Master Browser and indicate the Work Group name (these steps are optional for some home users) – GUI > General > USB Application > Servers Center > Network Place (Samba) Share/Cloud Disk tab - [Merlin – “if you have a NAS or a server, leave it disabled. If you have just a LAN of PCs, enable it”]
8. Disable WPS - GUI > Advanced Settings > Wireless > WPS tab
9. Disable WDS - GUI > Advanced Settings > Wireless > WDS tab
10. Disable MU-MIMO on both bands - GUI > Advanced Settings > Wireless > professional tab
11. Uncheck Xbox and B/G protection (Both bands). GUI > Advanced Settings > Wireless > General tab
12. Set Preamble type to Short on the 2.4GHz band - GUI > Advanced Settings > Wireless > professional tab
(Note – some older game devices may require the following settings to function properly such as -Long preamble & -b/g protection, (see step 11 & 12) (forgot who mentioned this)
13. Wireless Mode: Auto (default) - GUI > Advanced Settings > Wireless > General tab
14. Change the Control Channels for both bands away from 'Auto' after testing which Control channel works best (2.4GHz use 1, 6 or 11 'only') - GUI > Advanced Settings > Wireless > General tab
15. Spanning Tree Protocol: Disabled – GUI > Advanced Settings > LAN > Switch Control tab (Enabled if you run any additional hub/switches off your router)
16. IPv6: Disabled – GUI > Advanced Settings > IPv6 (For some newer devices such as Xbox One to get reliable open connection, may require that IPV6 be enabled) - (forgot who mentioned this)
17. Enable DoS protection: Disabled – GUI > Advanced Settings > Firewall > General tab
18. Set time zone to your area – GUI > Advanced Settings > Administration > System tab
19. Format JFFS partition at next boot: Yes - GUI > Advanced Settings > Administration > System tab
20. Disable Universal/Implicit Beamforming on both bands – GUI > Advanced Settings > Wireless > Professional tab
21. Disable Airtime Fairness on both bands - GUI > Advanced Settings > Wireless > Professional tab
22. Change the Memory Management: Regularly flush caches (default: Yes), change to No - GUI > General > Tools > Other settings tab