I'm installing a new Gibertini 85cm SE dish using a wall mount on the side of the house.

In my situation, I need a minimum 50cm distance from the wall via an L style wall mount.

Is it better to use a steel or aluminum mast/pole?

Would an aluminum L style wall mount be strong enough for an 85cm dish?

I've read conflicting opinions on the net about this, some people say aluminum wall mounts can flex...is this BS?

Thanks.