My 1968? delta unisaw has a fence on it with 2 round bars, a small crank adjuster and a camlok assembly. Assume this is original equipment. Can't keep it square to the blade, have to double check every time the fence is moved. See a delta replacement fence on Amazon, have looked at biesmeyer etc., Anybody have any experience with replacement fences? All seem to have good and bad reviews, more I look the more confused I become. Thanks in advance for your advice.