Mendel Snap-in Filament Spool Holder

I came across the Yet another dispenser for filament spools
by Think_3D and the SIMPLE SPOOL HOLDER FOR MENDEL which I liked very well but it had some problems. The main problem was due to the fact that the spool is so low and far back that the filament would rub against the threaded bar which was not good. There are quite a number of different solutions to this problem, mine was the Mendel Filament Guide which is the ancestor of this thing. It snapped onto the top of the Mendel and allowed