Experimental Rules #2 - Sentinels

Sentinels are a new sort of bogey that will feature in Operation Nemesis.  If you want to make a mission more challenging, but Hard Mode isn't enough for you, add 3-6 sentinels for fun.
Sentinels may be automated guns, booby traps or simply dedicated soldiers, dug into shallow trenches.  Sentinels deploy at the same time as the rest of the Red Force, but have a different model of deployment.  In missions where sentinels are used, they are given a deployment radius, but for these beta rules, if the objective is in the centre of the table, their deployment radius is 12" or otherwise it's 6".  This indicates how far from the objective marker they will deploy.  Nominate a direction on the tabletop as being “12 o’clock” and then roll a d12.  Each sentinel will deploy on the clock face hour at a distance from the objective marker equal to their deployment radius.
As with bogeys, don’t worry too much about being precise.  The important thing is that sentinels are deployed randomly at around the right distance from the objective.  If two sentinels are deployed at the same point, add or subtract 1 to the result until you can place the sentinel in an unoccupied spot.  If a sentinel would be deployed in inaccessible terrain, add or subtract 1 to the result until you can place the sentinel in an accessible location.
The diagram below shows the deployment of three sentinels (blue) at 2, 7 and 10 o’clock at a deployment radius of 12” from the objective marker (red) in the centre of the table.

Sentinels are always in overwatch.  By default they have Att 2 Def 3 Wnd 2 but never move, never count as obscured and don’t count as a bogey for the purposes of activation or bogey actions.  An engaged character can move them to the dead state as if they were down.  If a sentinel enters the down state, treat it as dead.  They cannot have support tokens but can be targeted and dominated.  A dominated sentinel is treated as a deployed sentry gun. 
Let me know what you think!