I started mining about three weeks ago and I'm stupid hooked on it.  I've already blown a bunch of cash on 1070s.
I had a couple old R9 280x cards sitting around so I threw them in a rig together. It gets 27 MH/s

So I am just trying to tweak all of my rigs now and one thing that I have read is that adding the argument "--farm-recheck " can add some hash rate. My hash rate numbers speed up scrolling down the screen, and some numbers are much higher, but they are also not consistent. 

So is it better leaving Ethminer the way miningpoolhub recommends in A) below or is there any merit to adding the argument like I put in example B) below?

Thanks for any help anyone can offer.
The MINING NEWB

A) ethminer -G -S us-east.ethash-hub.miningpoolhub.com:20535 -O NEWB.RIG1:xyz

B) ethminer --farm-recheck 300 -G -S us-east.ethash-hub.miningpoolhub.com:20535 -O NEWB.RIG1:xyz