Scotty,
Thanks for contacting us via Answer Army. When I look at the schematic breakdown of both units the p4500 has a different transmission unit and as a result they have a different arbor size (where you literally screw it in). In most cases parts will not be interchangable neither is it recommended from the manufacture. Thanks again for contacting Answer Army!
Regards,
Benji Corti
Customer Service Team
Scotty,
Thanks for contacting us via Answer Army. When I look at the schematic breakdown of both units the p4500 has a different transmission unit and as a result they have a different arbor size (where you literally screw it in). In most cases parts will not be interchangable neither is it recommended from the manufacture. Thanks again for contacting Answer Army!
Regards,
Benji Corti
Customer Service Team