How to Create a Parametric Sheet Metal Oblique Pyramid?

[wstandagebeier]

Hello,

I am Trying to create an oblique pyramid defined by two rectangles contained in two parallel planes using the sheet metal tools with one of the sloping sides being the stationary entity. The base (not the stationary side) parameter also needs to be fanged. The tip of the pyramid does need to be trimmed back to the smaller rectangle. The picture below should give a better idea of what I am trying to make. 

Wire frame view of what I am trying to make.

Thanks,

Wylie

[etfrench]

Can you show a solid model of the shape?  I can't tell what the final shape should look like.

[wstandagebeier]

Sorry for the poor description of the shape.

Attached is a simple sample of something close to what I am trying to do. The flanges that make up the three vertical sections are incorrectly flanged, however I could not figure out a way to get it to work. I wish to bend over these three pieces and miter the corners. 

Also attached is a sample of what I would like to do with the corner. 

I should explain some of my process. I draw the wire frame and then created stationary flange using the parameter of the large trapezoid. It seems that in order to add any other flanges I have to first add the vertical one on top of this trapezoid.  Only after adding this one I can add the left and the right trapezoids and there respective vertical pieces. 

Thanks for the help,

Wylie

[etfrench]

@TheCADWhisperer has an excellent video in this thread explaining how to do a similar task.

[chrisplyler]

Using @TheCADWhisperer's hybrid techniques...