hello all. I recently started doing some maintenance on my bike. I pulled apart the driven pulley to just clean and regrease it and im having trouable getting the thing back together with the seals intact. I bought this cup tool from scooterwest thats supposed to sit on top of the fixed half to help guide the movable half onto it. Whatever they sent me is too big and doesnt sit on the fixed half but rather jsut falls down to the base of it. are there any ideas or references that may be useful in helping me get this thing back together? Also thinking maybe to just upgrade the driven pulley if I can buy something thats already put together if thats a thing (looking for ways to throw money at my bike)