Erik walked over to where Elora had been working before, and found a metal puppet in his likeness, covered in blue leather.
Clearly, Elora had used a sigil to shape the simple iron into a puppet that Erik could use to fit the armor on. Naturally, this only worked because the metal she used couldn't even really be considered rank one.
She also used the same sigil to cover the puppet in leather, in the same way as was done to the projection that showed the final product and detailed design of Erik's armor.
He took the many pieces of the skeleton framework he had been working on earlier to the puppet, and began assembling them together by using the puppet to make sure everything was in the right place.
To keep them in place, he used the frostvolt technique of thermal shock bonding by first heating the fittings with traditional lightning, causing them to contract, and than rapidly cooling them with ice to make them expand and create a mechanical lock.