I don't pin often & I never sew over a pin. If I have something that needs to be held in place like intersecting seams I use "Wonder Tape" by Collins. It is amazing stuff. It is 1/4in doublesided sticky tape, it never gums up the machine or neeedle, it washes out so I don't have to take it out and it holds very very well. I find myself using it often for many things. I especially love it for doing bindings. It holds the back side of my binding evenly in place. I get it for about $4 for 10 yards and when I only use tiny little 1/4 inch dots it lasts a long time.