Not sure if this is a smart idea, but I am thinking of buying two BMM's. One to keep as a BMM and the other to eventually convert to a Carrack. I plan on buying the Banu Combo Pack - Warbond for $450 and a Banu Defender to Redeemer Upgrade for $65.
Now, can I use the Banu Defender to Redeemer Upgrade and then use a $0 Redeemer to BMM that I already have? This will total only $15 more than begging for second Redeemer to BMM CCU. Also, should I be able to use a $0 BMM to Carrack CCU later on if the prices remain as they are right now when the Carrack goes on sale again?