Ziroli plans are pretty good. I enjoyed his Ercoupe very much. If a 36cc is a good fit, which on paper it seems so then go for that. Put on your patience hat and have a go. If you are not sure ask before you glue. Many folks are more than willing to help. Is there any one at your field that builds from plans? If so ask if they will be willing to help. Building is half of this hobby, enjoy.