BA- dug in markers

One of the (some would say many) things Bolt Action doesn't do well is dug in troops- in fact they are missing from the main rule book, which in to my mind is a very serous omission! Quite often in our games we allow defender to start dug in rather than using the rules in the rulebook of being hidden.
We use a modified version of the rules from the Alligtor Creek scenario on the Warlord Games website.

Dug in 

• Hard cover (-2 hit)
• Extra protection: 6+ to kill (modified by penetration rating of the weapon as per normal) 
• If a unit executes a run, advance or charge order it loses the the dug in status for the restvof the game. 
• Number of hits caused by artillery is halved. 
• In close combat both sides fight simultaneously. 

The markers are made out of MDF, balsa, coffee stirrers and permafiller. I still have to add a row of sandbags to the top of the dug in markers but am waiting to get hold of some Das modelling clay to do that. 

Craig