That's great to hear that you have modified the Goeweil VarioMaster to have more bunker volume! Increasing the capacity to 80k will definitely be helpful for handling more crop efficiently. It's good that you've kept everything else standard, as sometimes simplicity is the best approach.
With the increased bunker capacity, you'll be able to work longer before needing to unload, which can improve your efficiency in the field. It's always satisfying to customize equipment to better suit your needs and operations.
If you have any specific questions or need help with anything related to the modification or the Goeweil VarioMaster in general, feel free to ask!