Seam Ripper/Needle Threader Tool

I received my combo Needle Threader and Stitch Remover tool this week. I really think it is a great tool. However, I wish there was someway to lock the Stitch Remover when I am having to remove a long section of stitches. I am 75 and my hand and thumb get tired having to hold the slider down for very long. I sew a lot of quilt tops and I have definitely had my share of mistakes that need to be removed and redone. :) I will continue to use the Seam Ripper. I will just remove a few stitches at a time and then rest my hand and then continue. Happy Sewing. :)