Anycubic I3mega filament holder and guide

I decided to remake holder and guiding of filament of my I3 mega.

At first I printed holder from creator McDos, but it seemed kinda unstable to me.
(https://www.thingiverse.com/thing:2750096)

So I remodelled it from scratch and little edited it, so right part could be now mounted on top screws, so it holds much better and doesn´t fall. After that I realised that some universal roll centering part is needed, so I designed cone part, that has glued-in nut for threaded rod, which is filamen