I guess I got lucky first try, I set up the cube 60s as station bridge for the 60gz and made sure they were in the bridge with the ethernet in winbox, firmware was updated to 7.14.xx. I then set up the 60Ghz on the as ap bridge on the sa cube. I also set up the wifi 5ghz also except I think I had to manually add it to the bridge. I set it up just like the ptp example on youtube (
https://www.youtube.com/watch?v=CCbVzl6WtF0), except only one would work at a time, then I changed the bridge to ap-bridge on the cube sa 60ghz interface and the 5ghz...then they both worked and were stable.
However, though both connected simultaneously but it tended to favor the 5gz wifi link. I then manually set the path cost in the bridge to 5 on the 60G and left the path cost of the 5ghz to 10. 60Ghz links became preferred and stayed stable. I disabled the 60Ghz on cube sa and the 5ghz took over, reenabled and 60ghz took it back. I then held a 2x10 board in front of the 60sa and the 5ghz took over again until I removed the board and the 60ghz took back over. I called it good and went home...checked the next day and the 60ghz links were still up and stable. No complaints from the customers 30 or so users that were then using it. The further client station is 600 feet, the closer one is 300 feet. I tested the links for about an hour two different days from my laptop in my truck and when it was sunny client to sa speed tests show about 1.9Gbit/sec for udp transfer and I think 1.5 on tcp, during moderate rain it was 1.2Gbit/sec on udp and 980Mbit/sec on tcp speed test (client to ap). I had these attached ethernet side to some Grandstream GWN7664LR outdoor aps at the two cube 60 stations and a third one at the main incoming fiber where they cube 60 sa was. The users are some happy campers...literally...it is wifi access for a new camper park and I got a complement from a camper on the farthest ap saying it was the best wifi in a camper park they had ever used so I am guessing it's all good.