Easton owns Beman,the new Beman Centershot is slightly larger diameter now then the old MFX.They use a H-insert and H-nock and they have lighter GPI.Easton has come out with a lot of new arrows they use an H-insert and H-nock size.They made the Centershot slightly larger as not to compete with the new Axis Traditional.The Axis Traditional still uses the HIT insert and X-nock same as all the old Axis/MFX.And the new Axis cost a bit more then the old MFX Classic's.The Axis Traditional is the closet to the MFX Classic at 8.9 GPI.The same as the old Beman Black Max,the Classic woodgrain would add .8 GPI.Both the new Axis Traditional and Beman Centershot come with 50-75 gr. HIT or 50-75 gr. H-insert with the shafts.How is your setup now,the new ones come with 50-75 gr. inserts.Say on a 30" arrow shaft the Axis Traditional is 24 grs lighter and the Centershot is 42 grs. lighter then the old MFX Classic.But they do come with heavier inserts,you may need to retune your arrows with the heavier inserts.If you didn't use heavier inserts in your MFX Classic's you can replace the brass inserts with aluminum inserts in either arrow.