Instead of using the glass shelf that comes with the Kalax insert make a glass back panel out of it! Great for room dividers.
The size almost fits, you need only small inserts — print 4 of them. Alternatively you canscale length and print only two. Insert the glass as you would the default panel and assemble the rest as per ikea manual.
Print with supports.
I suggest using white color. I was out of white filament, hence grey.
The author marked this model as their own original creation.