|Neptune and Amphitrite|
What happens is, you look and look and search for the perfect fit, whether its a picture or an assemblage part and then Eureka! you find just the thing but then that adult brain takes over and you start telling yourself "I may have to rip it to make it fit and it may ruin it if I screw it on there or if I do this the item is ruined forever, or this is too good to use on this.
My answer is Glue It, Screw It, Do It. In the big scheme of things it will be okay. You can always go over it if you don't like it. You can always unscrew it. There are millions of 'things' in this world. Use them.
Be fearless. Do more art.