Footprint of Cornerstone surge bin

I have two Walthers Cornerstone H0 grain surge bin 933-2935 on order ( https://www.walthers.com/exec/productinfo/933-2935 ).

The footprint is defined as 1 1/2" * 1 1/2" (3,8 * 3,8cm). I had one several years ago and remember a larger foot print.

Could those of you with this model on your layout measure the size and post the dimensions of the footprint please. I would like to continue planning with a correct sized mockup.

Thanks a lot for your support.

I measured mine at 2 1/8" square, not considering the ladder safety cage or the extension of the base for the grain dryer.

Thanks a lot. That is about what I had in my memories.