I cut standing up at my sewing table (36" high) - I have no luck sitting down - except if I'm using scissors (buwhwhwhahahahaha)
as for getting in the floor - fugedaboutit.... not gonna happen 8)
I also use the ruler with the 'lip' and I take time to make sure the sides are lined up.... no 'elbows' for me... that happened to me once about 10 years ago and I've been really careful about that ever since....
But I'm not fanatical about it.... I think my quilts turn out..... :wink: