GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
Post this in the prop forum. there are many there that will help you figure out what prop is best for your setup. You will need to answer a bunch of questions and they'll get you on the right track. 6500 rpm at WOT is definitly way too high.