Hi Elliot,

To do this in Polyboard I would suggest :

– create a Free Shape cabinet with the front sloping 

– extend the back to overlap the top

– In the resulting upper volume add a sloping Free Division

-Adjust the position of the Free Division and add the top and side panels using shelves and uprights:

Of course you’ll have to tweak the assembly details etc ….

There is of course other ways of designing this and depending on how you want to build it you might find that it’s easier to draw the production plans in CAD.

I attach the model that you can play around with.

All the best,

Ness