I think i´m beginning to understand the principals.
Having that gap between the hinge and the bearings optimizes the build space, but has the down side of the torsional loads you mentioned.To reduce this torsional effects i would have to bring the smooth rods closer to the center of the printer.
If i put the hinge right next to the bearings (without the gap) the build area will be smaller (on the horizontal plane). If i then increase the diagonal rods to increase the printing area i will reduce the maximum print height.
Having that gap between the hinge and the bearings optimizes the build space, but has the down side of the torsional loads you mentioned.To reduce this torsional effects i would have to bring the smooth rods closer to the center of the printer.
If i put the hinge right next to the bearings (without the gap) the build area will be smaller (on the horizontal plane). If i then increase the diagonal rods to increase the printing area i will reduce the maximum print height.