For anyone having the BET0 error problems , for me the best working cgminer is 4.7.0 , compiled on Rpi from git : https://github.com/blockerupter/cgminer . Don't know why , but seems to be working better than the AM one for some reason. Also for the spamming button , better is to open up the minera terminal under the "System" , cd /var/www/minera/minera-bin/src/cgminer or AM or whatever your minera uses. And just start it up with the arguments or json config which is at /var/www/minera/conf/miner_conf.json , then its easier to spam it and see what is actually going on without having to turn on the log all the time , works better for me that way.
This way i managed to start it up after few tries again, hashing 1400gh/s this time , 1170W power usage. 6% errors so far. Not sure if its good idea with my 1200W platinum corsair, its close enough.
If i keep --bet-clk 23 i was hashing 1200ghs with no errors and 1070W , not sure whats better.

Sorry for keeping the spam in the topic , i thought this could be helpfull.