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Wheelbarrow Tub Bolt-Hole Repair Shoe
A 76 x 44 mm load-spreading shoe for a wheelbarrow or utility trailer tub whose mounting-bolt hole has worn into a slot. It sits inside the tub with an 8.6 mm hole for an M8 or 5/16 in bolt, plus a 22 mm counterbore that takes the carriage-bolt head or a washer. Two 4.5 mm side holes let you add M4 anti-rotation bolts so the shoe can't turn, and the tightening load presses straight down through the layers (print it in PETG or ASA if it'll live outside).
Wheelbarrow Tub Support Wedge Block
A replacement for the plastic wedge that sits between a wheelbarrow tub and its handle rail. It is 90 x 40 mm and tapers from 18 to 38 mm tall (a 12.5° pitch). Underneath is a 26 mm wide 90° V-saddle that seats on round steel handle tubes about 25–40 mm across or on the edges of a wooden rail. The through-slot is 6.8 x 20.8 mm, so a 1/4 in or M6 tub bolt lines up even when the original hole spacing varies. The ribbed top has open pockets to save material.