Custodian DLC discount?

Just started back up with the game last week, when I last played I had gotten 2/3 of the parts for the Custodian. I read there’s a discount on the DLC for how many Custodian parts you have, but when is this discount applied? I’m still seeing full price for the DLC even at the checkout page. Mobdro


If I recall from when the mail was sent out the at the time of the discount becoming available if you had multiple custodian parts you would have received some mail with a link to the discounted page for the DLC on the gaijin store?
I mean I hope it helps a bit to answer the question but I’m trying to remember something real obscure here.