I had used b6 in place of caber with both deca and tren but still experienced some issues. WITH that said, i was running the b6 lower and the tren and deca high (separate cycles - not together) . Given my age now, I'm no longer interested in using caber so i decided to give b6 another shot at 600ed from the rip - it's worked out great during this cycle (the only thing that has, but that's another story). Zero sides from 400/wk to 600/wk - backed up by regular blood work.
I will be doing so again with tren during my next run. This will be the real test.