I agree, the indigogo should move forward.
Reguarding the bearing, you can already purchase one off the shelf from vxb.com, they are known as 8mm u groove bearings and run about $12.95/ea.
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www.vxb.com]
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www.vxb.com]
You may need to modify the idler to accomidate these bearings, they are 11mm wide x 24mm tall. I think 608zz is 7mm wide x 22mm tall.