Brass stock disk

[Fritz]

Don't get wrapped up in that "giving intel to the enemy" thing. The enemy knows exactly who they oppose in the line of battle. The brass shortage had the discs discontinued and the recess was filled with a plug. That's why the discs are scarce today.

I know I am reviving an old thread here, but I have a question on topic. Can I ask you to elaborate some on the plug filling of the stock disk recess? I ask because I have recently acquired a sporterized 1942 Lithgow No1 MkIII, that I will be restoring. The buttstock has a plug in the stock disk recess. Before I go and look for a replacement disk, I would like to be sure that I would not be making a serious mistake by removing the existing plug.