I don't like the triple straight stitch.

If I don't feel like switching my server over to do a coverstitch I serge then double needle. To keep the double needle loose and stretchy and not as tunneling I leave a long bobbin tail on each end and then stretch my garment as far as it will go after sewing. The extra thread gets pulled up into the hem or topstitching and loosens the tension more than I can on the machine.