Glenn, Wendells plans show most of the detail you need to build his RV-4 but as far as a guide you are out of luck. I don't know what a cut kit looks like as I hand cut all my own wood which undoubtedly is probably heavier than a cut kit. I shaped my on leading edges and they are not as round or shaped quite like the plans. For some reason, my preference on L/edges is to keep them as round as possible. If you want the cowl measurement between cylinders I can get that for you. Just let me know what you want for a measurement. Your RV-8 looks awesome. Wish my RV-4 looked that good.
Frank