Yeah, I can understand you want everything to look nice and have to speakers in the same position on each wall, I did the same.. \:\) When you calibrate the speakers for distance/dB levels, it will account for the small differences if you can't get them exact.

M60's and M80's are awesome. ;\)

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85