hi all, So after a few distractions I'm back on the build! 1st listening to the 8mm linear bearings on the anet a8 printer has gotten old. I also have a 12mm sbr12uu block linear rail set up for my cbeam build and can only get 2 of 4 working well - one is hopeless. I would prefer to upgrade than wait and chance replacement. any suggestions for new bearings or ... then I was talking with a local shop about aluminum for the bed of my cbeam plate maker. had read a few issues with how true - flat the stock was. he suggested steel. heavier but truer with out further milling? I know the spoil board can be surfaced but a twisted bed could mess up tensions ect.. between actuator and connections to rails. maybe the flex of mdf and then surfacing spoil board is the best way to go?