IKEA IVAR cat terrace 20x20cm

We are having an open aquarium integrated into Ikea Ivar system. So our cats try to play with the fish and drink the water. For this, I created that terrace. It is iteration#2, with more stability. Was using the same terrace without the stabilizing parts, printed in PETG for almost 2 years now, but cats grow, and the terrace is starting to bend :-)
Size is 20x20cm.
The terasse is plugged onto the stability connection on the frame of Ivar.
But please be careful, I don't think the construct