I designed a Part which allows you to attach the filament guide of the original Bambu Lab Spool holder to the back spool Holder @Nudelpapst created.

You can find all parts needed in the origianl bambu lab Spool Holder. To disassamble it you can use the tools that came with the A1.

First take of the filament guide/PtfeTube connector by unscrewing the Bolt hidden in the ball hinge.

Next we will need 2 M2 screws. We find these in the Arm of the original spool holder:

Now screw together the new Spool holder. First connect the small Part to the Spool holder by screwing in the M2 Bolts.

Then screw in the FIlament guide.