Thanks for the reply.
I've had another look, and believe to 'see' a target, you have to draw line of sight from its front base edge, to the targets base. (P27) I thought you had to have at least 1cm unobsured, but this suggests as long as there is some base visible, you can draw LOS from it. ..
.. my 1cm rule came from " unable to contact centr-to-centre" for chargers, if there is less than 1cm of exposed edge then the stand is not an eligible target because it is blocked.
In my opinion it would be good to apply that rule for shooters too, to stop silly formations where say only a few mm's is showing.. which could lead to arguments, is that unit regular or irregular?
However
Page 38 - irregular formations.... states it might not be possible to form a conventional battle line. In this case, the first base is placed in the standard way, the remaining charging stands are placed in a line but staggered to follow the shape of the stands presented by the enemy unit. So in the example above, the chargers would follow the V shape and make contact with all 3 stands. Which I think would make the chargers irregular, perhaps they would not benefit from support either?
One for the WMR committee to discuss?