I have been reading about using sheets for backing, 3.00 fabrics vs. 10.00 fabrics and it all seems to be based on the thread counts. However it is confusing because some have written to buy cheaper sheets for backing as the thread count is less and better for the hand quilters and the LAQ people to work with then I read that you should buy good quality top fabrics because the thread count is higher. :( :!: Also some say do NOT use sheets for the backing. Any explainations out there?