METHOD - silicone baking mat bed insulation and surface adhesion

Silicone baking mats, used for 2 things:

The much LESS interesting use:
- The pyramidal surface mat - thermal insulation between silicone heater pad/aluminium hotbed and the Y axis chassis.
https://www.aliexpress.com/item/Creative-Pyramid-Silicone-Baking-Mat-Nonstick-Pan-Pad-Cooking-Mat-Oven-Baking-Tray-Mat-Kitchen-Tools/32807788480.html
I have been using the pyramid mat for a few months. Compared to proper stuck-on insulation this is probably quite insubstantial, but as a simple, removable method to retain and constrain heat under the bed, this works better than nothing.

The much MORE interesting use:
- The flat mat - sticky interface between polymer 'buildtak' style bed surface and aluminium hotbed.
https://www.aliexpress.com/item/Red-Silicone-Pastry-Bread-Bakeware-Tray-Oven-Rolling-Kitchen-Baking-Mat-Sheet-PML/32693285580.html
Lay the silicone mat out *matte side up*, without stretching or deforming it, and check that it is flat with no ripples or deformation, and lift