The shaft 126 is coupled to the center support 70 of the stand 38. The shaft 126 provides a cantilevered support for the drum 34 above the platform 74 of the stand 38. Specifically, the shaft 126 engages and supports the drum 34 only via the back wall 42. Because the drum 34 includes the opening 58 in the front wall 46, the shaft 126 does not extend through the entire width of the drum 34 or engage the front wall 46. This creates a cantilever effect whereby the drum 34 is cantilevered over the platform 74 by the engagement of the shaft 126 with the back wall 42 of the drum 34. This cantilevered design enables the front wall 46 of the drum 34 to include the opening 58 for inserting the hub 30 into the interior 54 of the drum 34.
The mounting plate 122 is fixed to the back wall 42 of the drum 34. In some embodiments, the mounting plate 122 is integral with the back wall 42 of the drum 34. The slip ring 130 is disposed within a space 142 (