Bespoke keyboard mapping - Traktor Pro/MacBook Air

I have posted this on NI's website/community , but I suspect I might get some good answers on DJTT too.

I have been using VDJ as it's much easier to create bespoke keyboard mapping, however, I really want to switch to Traktor Pro (I own the product but don't yet use it).

I had a controller, sold it, and don't need another. I buy techno tracks and then make mixes from them for my consumption only.

VDJ (or preferably Tracktor Pro) + MacBook Air + Headphones is fine for me.

What I can't seem to work out how to do is adjust by, say, 5% or 10% EQ High, Mid and Low for Decks A, B and C.

For example, I want key Q to increase Deck A Low EQ by 5% and key A to decrease Deck A Low EQ by 5%. Likewise for W and S and E and D. And so on horizontally across for Decks B and C.

I also keep the crossfader permanently in the centre, but want to be able to make volume on Decks A, B and C either 0% (fully down) or 100% (fully up).

(I mix using EQs, as opposed to volume or crossfader.)

I know how to do basic mapping, but not how to adjust up or down in increments as listed above.

Any help out there?

Thanks in kind,

Alex.