Personally I wanted nothing else but a plow or cultivator at the rear of my TEA20. I decided to search the web and found a cultivator posted 6 years ago which needed a little attention. But would fit my TEA20 perfectly with a few modification.
Everything prints no support,
Print shovel as imported with a 5mm brim, no support required.
Lay flat as required the remaining parts.
I used 3mm rod to secure all shovel arms and spring retainers, but you can use bolt and nut.
The rod I used is 2mm rod with 1mm plastic coating from dish washing stand purchased at discount store, you get 20 or more rods per rack. All metal 3mm rod for cheap, you get them from old toaster oven grill...
Springs: 7.93 OD x 31mm Long ( from 200 pcs assortment spring)
Black: PLA
Red, Gray: PETG
Tires: black TPU
Thank you.
The author remixed this model.
The biggest issue was the cultivator not raising evenly due to a fixed attachement at top. I created new parts to solve the problem.
I also increased the height of the wheel arm attachements to remove all play, created bottom spring retainers for easy spring fixation and a plate at the rear.