I have been having an issue with my Big Red machine loosing connection while sewing a large jacket back design. It ususally will get about 3/4 way thru the design and doesn't do it on all of the orders, just once in awhile. The propblem is, it usually is a damaged item! I have done everything that Melco has directed me and it has done it again. Any techs have any other advice?? Thanks!