Does the Summera keyboard drawer fit the Ikea Expedit desk?

Heyho guys,
I plan to buy an Expedit shelf along with the matching Expedit desk and screw the Summera keyboard tray underneath it.
However, I am facing two puzzles:
1. Unfortunately, the Ikea website does not state the dimensions of the keyboard tray, and
2. I don't even know if it can then be screwed onto the Expedit desk.

I have already looked around a bit in the forum and, for example, checked the cross-section of a Lack shelf, and if the inside of the Expedit desk looks exactly the same, I at least see black.

Best regards

Thanks in advance for the quick responses,
so the honeycombs inside at least make it impossible to screw the pull-out directly to the table, I thought there might be ribs inside that you could at least work with.
But the idea with the wooden slats is a good one, I also found out the width of the keyboard pull-out, it should be around 64cm. Since that seemed relatively narrow to me, I looked for other keyboard pull-outs, not from IKEA. There were some that were a bit wider, but one of those costs as much as 7 IKEA ones..
So I think I will give the idea with the wooden slats some thought.