If you are looking for resources to create new drumkits for the BB, This reddit post may be of interest to you . .
"7 different acoustic drum kits. Over 1,200 multitrack samples - free to use "
“if you want to download a shit load of multitrack drum samples and use them in your production, click the link. If you want to know more, keep reading. I’m not trying to sell you anything, all of this stuff is 100% free.”