I have a Acra 1340 that I picked up used, am new to turning metal but it appears to me that my dials can't be zeroed out. Am I missing something? If they can't be zeroed, is there some sort of aftermarket setup that will allow them to be zeroed? I don't have a DRO on it, would like one in the future but that's down the road (hopefully not too distance). Is this normal to not be able to zero dials on the saddle, cross slide & compound? If they can be zeroed, how? Thanks all!