I have an old computer desk for my sewing machine. After about 5 years of nagging, my DH finally cut an opening on top to drop the sewing machine. He used some scrap pieces he picked up from Home Depot, 2x4's, a 3/4" plywood, some glue, and screws. He then screwed the top table of the sewing machine flush so now I have the machine at a comfortable level. The machine can still be taken out for cleaning and/or servicing.