So a while back we were excited to learn Duke at Sawsalvage had sourced a replacement bearing for the pto side of these saws. It turns out the seal in those bearings would not hold vacuum or pressure so they weren't the answer we were looking for. Recently I purchased a similar bearing from Sawzilla Parts hoping it would have a better seal. Alas, the Proline bearing that Sawzilla sells is no better and also does not hold vac/pres.
But here is the difference in companies; Duke acknowledged the poor seal and offered refunds to anyone that had purchased the pto side bearing. Whereas Sawzilla - when contacted - couldn't even bother themselves to reply. Not only that, but when I submitted a review for the bearing on their website, they scrubbed my review and continue to sell these substandard bearings.
For my part, it's not a huge amount of money to lose on a bearing that I suspected might not be what I had hoped for, but the very shady business practice of Sawzilla ensures I will never make another purchase from that company again.