I clamp mine by the boom for everything, including working on the back end. If I am working on the rear wheel specifically, I remove the wheel from the frame. If I am working on the rear half of the frame, I remove the rear wheel anyway for better access, and raise the stand until the rear dropouts are off the ground. Sometimes I will prop the rear dropouts on a plastic step stool to give the back half something to rest on, while I scoot around it on a short work stool with wheels ($20.00 at Harbor Freight). Regardless, the bike remains clamped in the stand at the boom.