Flyboy1958,
You've made a good choice and I believe you'll be satisfied with it. My CAP-X is powered by an OS 1.60 with a Bisson Pitts style muffler and it is a great performer. I elected to use a Perry VP30 fuel pump rather than plug or pinch the pipes on the Bisson muffler. My CAP-X is assembled stock and it has no CG problems. The prop is an APC 18x6W.
I've always been a lover of wood props but I've given up on those grossly out of balance vibrating Zinger bats. There is no way I can remove enough wood from the backs of those props to safely bring them into balance.