Successive EQ recommendations and adjustments with REW

All,

HUGE fan of the capability of REW - "found" it a few weeks back and it has changed my tuning game. In particular, I've beening enjoying the equalization feature which has eliminated all of the guesswork from my full-range equalization efforts.

A question I have about equalization (I'll start with the disclaimer that this is in the car audio arena):

I'm using a "generic" EQ that has PEQ functionality across 31 completely variable bands. Q is limited to 6.

I often need to go through multiple, successive rounds of equalization. For example, I may EQ a driver individually, then EQ combined response. I have a hard time adjusting the first round of filters during the second round. Ultimately, I end up just usually creating another filter that may have considerable overlap with the first. I'm essentially EQ'ing the EQ.

As an example, EQ'ing a single driver might require a 4 dB boost at 2125 Hz with a Q of 3.89 (as predicted by REW). Once combined with the opposite driver (summing/cancellation), I might need to do a 2 dB cut at 1895 with a Q of 2.1. Since it's too hard to adjust the first filter accurately, I just create a new filter that overlaps (and works opposite to) the first.

Thoughts on whether this is an issue? My other option is to just use my EQ as a 1/3-octave by manually setting the frequencies and Q, which would be easy to adjust for successive rounds. I find this to be less accurate and often requires more filters.

Also, is there any way to limit the Q in the "generic" REW equalizer?

Thanks!