A printer I built many years ago with what I had in stock.
It finished with a 220x220 Anet A8 heatbed, but you can modify the heatbed support to receive up to 300x300.
Linear rails are overkill, but I had it. It print as good as my i3 mk3s(wich I love and use the most), but, thanks Duetwifi, wirelessly.
Print with PETG, no support required.
The author marked this model as their own original creation.