Is it a System Board, is it a Hangboard? No it's a Modular Board! Train with it however you want - feet on or not, horizontal edges or not, slopers or...
Upstate Bouldering: Do It Yourself: The UB Hangboard
Hangboards – WhiteOak
Jacob Hamman -- How to Make (almost) Anything
Deckenbefestigung für Fingerboard, Griffe, Campusboard, Klimmzugstange
FULLY MODULAR HANGBOARDS - YouTube
STL file Modular training table, Hangboard, progression table, suspensions, strengthening of fingers, arms, forearms, back. Pull-ups, Bars. Asymmetric Finger Board 🔙・3D print model to download・Cults
Deltaboard : a modular and upgradeable hangboard by Delta — Kickstarter