Here's the Breakdown of my Custom DrumBuggy:
The Main Base of the Washer Deck was too narrow for Drum Support on each side so I cut the lip from the deck sides to accommodate addition of Channel Iron Extensions/Axle Mounts and bolted it securely to deck along with two larger shoulder bolts on either side that secure DrumPit to frame. The heads of the shoulder bolts lock down upon the outside lip of the Drum Bottom.
Keeping it nice and slip free when I lift up front of Buggy for travel.
If you're diligent enough you can find means to an end.