Kubota publishes good articulation diagrams of their loaders. The TLBs always had a little more range, strength and angle. Made a big difference when doing grade work. Also better at manure barn clean out, composting and caming yourself out when stuck.
May consider changing your bucket attachment points instead of the loader? Could even use another bucket to practice. Less risk and easier fabrication. Could even incorporate ssqa.
Changed my M5030 to bobtach ssqa years ago. Simply welded a ssqa plate to the pin on bucket gussets. Lost a little rollback which was noticeable. The gusset plates could have been trimmed before welding on the ssqa plate to fix but never got around to changing. 90% of the time used a grapple.