Idlers - would these work?

Yeah, I'm just going to buy a pair of PVC 2" x 2" idlers from USAknifemaker when they come back into stock.
 
Longboard idlers may be a good idea, you can choose among first class products in term of duro and bearings quality.
Casters need balancing, i mean...mandatory!! Also you can find ones with first class bearings, but they are expensive.
You will LOVE your own built grinder... but she will make you sad if you don't care about balancing things in first place :)
 
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