Can you change the BDB integration so it matches better with the progression of the actual US space program? The way it's currently integrated I can make a Titan II Missile before I can make a Redstone Rocket, also in order to unlock the engine for the Redstone Rocket and Mercury deorbital engine you have to upgrade the RnD building yet you have almost everything for a full fledged Gemini mission before the RnD upgrade.
Other than my issues with BDB I am loving the experience and ability to select where I focus my science points and the actual progression feel it has over the stock tech tree and CTT.