Complex sentence: After a week, Wallner presented his first 3D designs to Wertich and Hess (the standard Roman carriers, diggers and builders), who decided to make some additional changes, such as making the settlers more rotund and enlarging the heads.
Split into simpler sentences: After a week, Wallner presented his first 3D designs to Wertich and Hess; standard Roman carriers, diggers and builders. They decided to make some additional changes, such as making the settlers more rotund and enlarging the heads.