This is how I do it.....I put the wrong side up of the backing, on my average size dinning room table, then put down the batting, then the top....I make sure all my edges are correct, I generally cut by batting 2" wider all around, and then my batting 3" wider than top, using this method I can see the edge of my top, the edge of the batting and the edge of the backing all the way around, and know everything is square and good to go......
Next I run a row of safety pins in the middle from right to left, about 8 inches apart, this gives you a ' center flip point'...
Now what I like to do is the top first, so I flip the top to the middle (against the pins) drizzle my ESG (Elmer's SCHOOL Glue) in a thin lazy circle motion about 10-12" ON THE BATTING.....fold down the top and smooth with your hands until the section is wrinkle free, then fold back the top to the bottom of the previous glue, and drizzle again, flip down, smooth and continue until you have the top half done. At the point I spin the top around and do the other side in the same manner, only drizzling about 12" down at a time, do not worry if some of the glue soaks thru the top, it will dry and it will wash out......once the top is done...walk away for lets say 30-60 minutes, this will allow the glue to dry.... Now flip over your quilt having the un-glued backing on top and the dry smooth top on the bottom. You still have the safety pin row in the middle, that has kept everything together. Do exactly as you did for the top, flipping to the pin line, drizzling glue onto the batting and smoothing down the backing. YOU CAN GET IT AS SMOOTH AS GLASS.....once the back is done, and everything is smooth, I like to let it set for several hours or over night if possible....both sides should be very smooth, you will not have any wrinkles, your needle will not get gummed up and after your binding is on just throw it into the washer.....or not
I hope this helps some people with this great cheap method.....if you need more help PM me