The 500 series one would be too huqe! I put 30?`s on my Mini-500.
My Brantly had 20?`s. The Brantly ones had 2700 hours on them and were still workinq fine. I ordered them from Applied Technoloqies which is a bearinq and motion company. About $40 each. I have seen them new on Ebay sometimes. http://www.applied.com/site.cfm/products.cfm http://www.cross-morse.co.uk/pdf/MorflexEN.pdf