So I commonly source parts from ebay. It is easy with payments through paypal. I can find anything there and the shipping is usually free and fast. But the linear guides from ebay just aren't cutting it. They are not perfectly smooth. A couple are but most aren't. And at this point I have wasted money buying a bunch of blocks and hoping to find the few more smooth ones I need. I am now trying to source them from here: https://motionconstrained.com/store/...linear-guides/ And I was wondering if anybody here has a better suggestion for where to get linear guides from? I ordered the 2 545mm rails with 2 blocks on each rail and it was $262. That covers Y. I might need to go back and replace the 2 for X and the 4 for Z with higher quality components.