We have sold quite a few catchers for these newer superflow decks. I have had no complaints so far about it's ability to fill the bag. It does concern me a bit that your mower does not throw the grass very far. It is only about 3 feet to the back of the catcher, but you need a good discharge force to fill every corner of the bagger. Are you perhaps using a mulching blade on your mower? The best configuration for bagging is to use a high lift blade on the spindle nearest to the catcher (the other ones can be mulching or lower lift blades). You might also want to check your belt tension, if it is slipping a bit the blade rpm will be low. Give me a call if you have any questions.