One of my houserule posts on Edge:

https://shadowland.blog/2020/05/06/houserules-edge-cinematic-play/Short summary, the blogpost has the detailed explanation as to what and why:

Players:

- 2 Edge max gained per ACTION, including temporary Edge.

-2 Edge KEPT max per combat round

- Edge Pools max at 9.

- Edge transfers ignore the limit, BUT you can’t transfer non-kept Edge.

- If you and an ally are attacked together, and you transfer gained Edge immediately to the ally, it counts as kept Edge (and is restricted by the 2 kept max limit).

Grunts:

- (Unit-size/5, rounded up) Edge Boosts allowed per turn, instead of 1 Edge Boost per turn for the entire unit.

- Downed grunts still count for the unit size (see rule above), but routed grunts do not. Routed grunts also cannot gain or spend Edge.

- 2 Edge KEPT max per combat round, for the entire unit combined.

- If Edge cannot be kept or spent, due to the Edge Boost and Edge Kept limits, convert the remaining point(s) into bonus dice

- When multiple grunts are attacked at the same time, they gain Edge together (so just once), but also spend Edge together (e.g. they gain 1 Edge but spend 2 to reroll two of their failures? Then each grunt gets the benefit of the reroll).