Modified folding spool holder bracket

I really liked the original concept by PrinterInUse, but after printing I found that the model he created did not account for a raised brim around one of the bolt holes in the P1S spool holder. Additionally, the bolt holes for attaching the spool holder to the bracket were not wide enough for threaded inserts. I modified his original model by increasing the diameter of the bolt holes to allow the insertion of M2.5*6*3.5 threaded inserts, and added a relief ring around the non-flush bolt hole to allow the spool holder to sit completely flush against the bracket. These design changes increase the rigidity of the part, minimizing the sag experienced by myself and other users with the original model.