Well Joe, if the offset is 1/16" = 0.0625" over 4.5", then .0625/4.5 = sin(offset angle). So, (offset angle) = arcsin(0.0625/4.5) = 0.8°. I don't think that this offset makes a whole heck of a lot of difference.

Dale

PS: No math wiz, just simple trig.