I'm about to start using my new easel and I had waited to align my enlarger until I got it. I had noticed before, when aligning with my old easel, that when using the mirror method, there was a large difference between the baseboard and the easel. My baseboard (countertop actually) slants slightly one way. Do I level my easel first as best I can, or can I just level my lens and lensboard to the easel no matter if its slightly out? I ask because all the bubble levels I have are slightly out and I think just buying a new one from the hardware store won't make a difference.