The three idler gears in the B7 will all be exactly the same number of teeth / same exact part number. There will be no change of gear ratio there from what they already have currently. It's just simply a way to get the motor further forward. Caster block plate... well I don't know what their plan is there with option parts, but when I raced I felt that the "next hole over" was usually too big of a change. With a CF plate, you could do something like half-hole more in or out to have a finer adjustment to really dial in the feel. I like it.