Van's Aircraft is the leading manufacturer of experimental sport aircraft kits. Their first kit was the single seat RV-3 released in 1973. This was followed by the 2 seat tandem RV-4. The 2 seat side-by-side RV-6 was released in 1986. I purchased the kit for my first RV-6 in 1996. The RV-7 is the current production side-by-side follow-on to the RV-6. The RV-7 and other current production kits utilize matched hole manufacturing where most rivet and bolt holes are pre-punched and parts formed such that little jigging or fitting is required.