Our team (6364) is thinking of making a DR4B. This is my third year, and I have not built one yet. If someone knows of a good video I can use, that will be appreciated. I am currently using a 4 bar at the moment. Is there a way to build off of that will be good. Thanks for all help!

Here is a nice summary of one method. Teams put motors in different spots, but you can see the common structure in all of them:

So it is 2 bars, then reverse, then another 2 bar?

Well, it’s a 4-bar reversed and then another 4-bar forward on top of the first. If that’s what you meant with “2 bars,” then yes.