Yeah I would.
I would start at 2ml of A and 2ml of B to 1 ml of water, PH'd down to 5.8-6.0. Until the EC meter arrives. Always shake well before adding part B.
Water till 20% total run off.
I would then lift the pot, to get a feel what the max weight should be. Wait 1 day for the next feed, and then lift again. That should be your minimum weight. From there I would go twice a day feeding.
Getting to grips with pot weight I find really useful. You can detect if a girl is not feeding.
Growing in coco, you will see a turn around immediately. A nice green is what you are aiming for. Not dark and waxy or any sign of yellow.
It is so much easier to underfeed and get the girl on track than over feed and start lock outs and all sorts of pain!