Hi again scoffey, mate without wading through the spare parts manual for the SB 590...I would say very few...the whole design is different for one thing, the Scotty 45 being chain driven whereas the 590 is belt driven...the rear drive rollers have a completely different set up....even the cylinder reel is different....so no, they are not very compatible unfortunately. wink
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin