-Clever idea, and nicely shown. Thanks for sharing, Jon!

Good thing he used 1-2-3-blocks to keep the roof truly flat when mounting!
Any slight unevenness will (as you all know) be magnified 87 times at that H0 scale!

I was first anxious he'd get hurt by a 1-2-3-block toppling over his thumb (or worse) in the end, though...
But then - why - oh why - is he using a Metric ruler?