Hello - Any suggestions for the setting - Additional CGMiner Flags :

I have used both of the paramaters below.  Any thoughts?

--gekko-mine2 --gekko-start-freq 250 --suggest-diff 442

or

--gekko-mine2 --gekko-start-freq 400 --suggest-diff 442 --gekko-compaca1-freq 400


Also, is there a sweet spot for frequency? 

thanks!