I really like the brushes the sift came with but mine are starting to look ragged! Formlabs does not stock replacements for these last I checked, I would REALLY like to get some of the original brushes. I have ordered various brushed from amazon but in all cases the bristles are too soft to be effective. What are you all using?
I think the original ones are still too soft, there are several nylon brushed that are hard enough. Formlabs recommend to get a Dremel versa and it is really a great addition specially with large parts. You can also try brass brushes they really remove all powder.