War Reservation System

Many 3rd party legit (I hope) tools, with this feature. But it would be great, if it could be fully integrated in CoC.
Example: ClashCaller

So, the goal is to avoid that situation where you have decided what's your enemy target, start planning how to attack, start coocking your troops, and in the middle of this, you see that a clanmate has chosen the same target that you did. Which is tottally legit, of course, but frustrating.

So in order to help clan to avoid this, and as mentioned before, there are several tools out there, thats trys to implementent a reservation system.

The mechanism, is quite simple:

You choose your target, and make the reserve. Nobody can attack it, in a certain period of time. Let's say, 4h, 8 12h, after war init. If base is not attacked for any reason, the someone else can make the reserve and attack.

So, it could be great, if this could be implemented inside. With the following features:

Clan (co)leaders, can decide if they want to enable this feature or not.
If no...there is no problem, as they will continuing as before.
If yes:
Clan (co)leader, choose the max. period of time, a reservation is active, before war starts.
In preparation day, clan mates can start reserving their targets.
No one can attack another reserved target, until expired.
To attack a target, it must be firstly reserved (optional too).

Again,
This all exists allready, but could be great, and quite easy to implementent, if integrated in CoC.

Thanks.