Billy Bookcase Extension Question

Hey guys so bit of a weird one here. But Im looking to buy a second extender to reach maximum height. However they are each such a odd height I can't actually put in a shelf in the extension as my items ( games) are just too tall.

What I'm wondering is on the first extension is it possible to not use the top panel ( in red)of the first extension and then put the 2nd extension on top of that so that I can now fit two shelves per an extension. Basically for the first extension just use the sides and back panel, then for the 2nd extension build it as designed.

Or does this ruin the integrity too much?

Basically I'm in a rock and a hard place. Billy's are too short and the extenders basically only add in one extra shelf per when they are supposed to be able to add two shelves.

Hey guys so bit of a weird one here. But Im looking to buy a second extender to reach maximum height. However they are each such a odd height I can't actually put in a shelf in the extension as my items ( games) are just too tall.

What I'm wondering is on the first extension is it possible to not use the top panel ( in red)of the first extension and then put the 2nd extension on top of that so that I can now fit two shelves per an extension. Basically for the first extension just use the sides and back panel, then for the 2nd extension build it as designed.

Or does this ruin the integrity too much?

Basically I'm in a rock and a hard place. Billy's are too short and the extenders basically only add in one extra shelf per when they are supposed to be able to add two shelves.