Systems and apparatuses including apparatuses that can be used in a knee replacement procedure are disclosed. According to one example, an assembly for a knee replacement surgery is disclosed. The assembly can comprise an adjustment member, a carrier assembly, a posterior slope housing assembly, and a boom. The carrier assembly can be configured to selectively couple with the adjustment member such that the carrier assembly is moveable relative to the adjustment member to a desired position. The posterior slope housing assembly can be connected to the adjustment member and can be configured to pivot the adjustment member relative to a portion of the posterior slope housing and a tibia. The boom can be coupled to the posterior slope housing assembly and can be configured to couple with a mounting component to mount the posterior slope housing assembly, the carrier assembly and the adjustment member relative to the tibia.