I'm not laughing, but how do you get it straight and keep it straight? For me, that's the hardest part of loading the quilt top!
Then again, I put the quilt sandwich together first and then load it onto the take up rail, let it all hang free until the second to last row of a quilt. The weight of the quilt keeps it taut enough until then. I also use side leaders that I made. Seems to work for me and for the quilts I make.