Hey Edna Pearl
I've been reading you post with some interest. I gave up on clips years ago.
You say you having trouble with your tension and a size 75 needle. For piecing this size needle is fine but for quilting, remember you are now working with three layers that equal the density of denim, so you have to adjust your needle size. I machine quilt but did free motion for a long time. I found out the hard way the a bigger needle say a size 16 is better for quilting while the 11/12 size is best for piecing. Small needles will flex too much while FMQ and could damage the SM faceplate. When the needles flexes it could bend the point and then you could hear a weird sound as the needle pierces the fabric and it has a hard time making the stitch plus the bent needle could pull the batting to the surface.
You are using spray basting. The spray basting can gum up your needle and it had a hard time going through all three layers. If you take an alcohol dampened cotton ball and wipe down the needle you can get the gunk off the needle quickly. Another suggestion, find some spray silicone, dampen a scrap piece of cotton batting and place it under the thread so the thread can pass over it before it goes through the tension disks. The silicone will cause the thread to pass through the quilt sandwich like butter.
Have fun learning and practicing, practicing, practicing.
Kate T. South Mississippi