Adjustable height by 25mm.
Locking rod is better to print for rounder shape thinckness 0,1mm.
The sliding locking system on the parts bottom stand, cover and footstool must have supports, see pictures.
Cover have hole to pass through the belt. You must make the belt, that you thread through to the cover and you catch for isofix.
Update:
Added Larege Pedestal for greater stability
Update:
Conjunction modification Bottom stand with Large pedestal for better and strong conjunction.
Versions 2 Large pedestal and Bottom stand cannot be combined with the original version pedestals and Bottom stand. With others parts can be combined and other parts can be combined between themselves.
Rounded edges on the locking systems.
Modification are see on the pictures.
The author hasn't provided the model origin yet.