I am interested in hearing if members have found a tall-thin column of pdr or a short-wide column shaped bushing gives the best results in various powders? Do course grains prefer either? It would seem when using fine grain powders shape wouldn't be too important.
The difference in height possible in a star would be the thick bars using commericaly available bushings, or at the other end, an "O" bar with a larger diameter.
Thanks,
Ron