Anyone used Ecodeck with pre levelling?

[havo]

I'm exploring using something along the lines of Ecodeck to make a temporary/permanent hardstanding over existing old concrete and concrete slabs (to put temporary shed type structure) but scratching my head about levelling options for the ecodeck. Do have a possible idea but might not work .. I know there are some smart and innovative folks on here...

 

[havo]

Maybe some blocks under each corner of tile (different thickness/height) to get level and height?. Prefer not wood unless tannelised?. Gravel in the Ecodeck should hold all together?

 

[Blueball]

I know this isn't actually addressing your question but we used ecodeck on our gravel drive and, stupidly, didn't put anything round it so after a while the wheels of the car started breaking the outside edges. I appreciate you don't seem to be in the same position but worth considering.