I didn't know that. You learn something every day. You suggested using wood dough right?If you put a coat of wax on the bottom of the tank it won't stick to the bedding compound and that will remain on the stand when you lift your tank.
If you use a styrofoam or elastomeric mat you will probably achieve full contact.
Yet that contact will not be equal as far as pressure on the tank goes.
You need to set it in something that will flow a little bit and then stiffen up, to get equal pressure everywhere.
Now depending on your stand and what your stand is standing on, that may not be the ideal situation from a structural standpoint; but I'm assuming that all things are nominal