I made such a stove some time ago. Here is the link to the original post . It worked when I tested at home, but I haven't tested it outdoors or for longer period yet.
I think that the aluminium should be OK for normal use provided the ventilation holes are large enough (and they should be to avoid CO production) and pot large enough. I'm sure that holes I used provide more ventilation that original windscreen of the stove. The plywood base could be protected by adding an aluminium sheet above it (with some spacers in between), but even this is not necessary IMO - you can run a white gas stove with a windscreen on wooden platform without burning it. I am a bit more concerned about the fuel line inside the cone, I measured the temperature close to it but I don't know what the fuel line can tolerate. On the other hand, when it can be used with powerful white gas stove and windscreen, it should survive something. But this is the place I would like to add some more protection.
The rationale behind the design is not to protect the stove in wind or improve efficiency, but to provide stable cooking setup for use in tent in winter. The cone is connected to the base when it is set up, so the whole system is stable, yet you can lift the pot easily.