I keep reading that to make my sewing table ergonomically correct my elbows should be at a 90 degree angle while sewing. I have taken the casters off my store bought sewing table, bring my drafting chair up (but too high and my legs dangle uncomfortably) but still don't get the 90 degree--it's still too high. With my table the machine does not recess in the table top. Short of cutting the legs down on the table, any ideas? I find that piecing really gets to my legs and shoulders--much more than long arming!