I bought a pair of Steelcase Criterions from a local used furniture store for $75 each. They have been wonderful. But I am going to have to order new pistons fo

I bought a pair of Steelcase Criterions from a local used furniture store for $75 each. They have been wonderful. But I am going to have to order new pistons for them as mine has started to slowly sink. Those seem to run about $45 and are easy to replace. Might upgrade the casters while I’m at it.