2" square aluminum studs aren't really studs. They won't support anything, and in fact you can damage them if whatever you mount to them tears away.
Redwood installed wood behind my brackets for the TVs. Some install steel plates. You might try to verify that if you can.
Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW