I too am greatly saddened by the sudden closure of Sonnex. Next month I will have been enjoying experimental aviation for 49 years, and after starting and completing 5 homebuilts I feel qualified to comment...and yes, one was an RV-4 built with a partner immediately after completing my first LongEZ in 1983. At that time, each homebuilt designer selected what they felt was the finest newly completed example of their designs to be honored as a Wright Brothers Award winner at the Dayton Ohio International Airshow. I was selected by none other than Mike Melvill and Burt Rutan to attend in 1984, and it was there I first met Alan Tolle with his new RV-4 , the Vans winner that year.
Alan gave me a ride in the RV, and I reciprocated a ride in the EZ and was impressed how similarly they flew despite the obvious configuration and construction differences. We were both from SoCal, so when I returned home I convinced my dear friend Glenn (RIP) to join forces to build a RV-4 with the promise of Alan's assistance. We used a Phlogiston spar, but other than that we built it from plans, including scratch building the cowling and fiberglas fairings since I had plenty of composite experience. My first Long EZ cost $28,300, including a brand new, in the crate O-235-L2C (bought from Beech for $4,950 as a result of them ceasing Skipper production). It was IFR capable with Collins avionics, and self painted 4-color Imron paint. The RV-4 cost less than the EZ to build as it had a nearly run-out O-320, a wood prop and single color acrylic enamel paint.
That was the beginning a of a long string of homebuilts: 2 more EZ's (one was the proof of concept fuselage lofting for the Berkut), a PJ-260 bipe that we did not finish but was eventually completed in Florida with a Continental 225 radial, and assisted with or co-built a Christen Eagle, Glasair, and a VK-30. So, one metal, two tube and rag, and a bunch of glass and resin speedsters...plans built and kits.
Very early on I considered kit building as a sort of faux homebuilding, with the "kit assembler" some kind of slightly less accomplished builder. But, as you all know, completing any aircraft, kit or plans, plastic or aluminum, is a huge accomplishment and tells me a lot about the character of the builder - it isn't easy to build an airplane no matter how you approach it. The higher truth is every homebuilt (Vans, Sonnex, Breezy, EZ, Carbon Cub, ...) promotes aviation, and we should be doing everything we can to ensure there are more aviators and more GA aircraft whether they are MOSAIC, certified or homebuilts. I'm going to miss Sonnex, I logged a few hours in a Sonnerai that was wonderful.
Alan, wherever in the heavens you are now, thanks for instilling the drive to continue to create new airplanes, as I very likely would have been one and done without your inspiration and help with the RV-4. Let's hope someone picks up the pieces at Sonnex, and helps the unfortunate builders caught in the middle complete their dreams. I think my building days are over, but am captivated in bringing my old V-tail back to life with what I learned as a builder, and the standards those who have gone before me developed. And Mike Melvill, the entire homebuilding community owes you a world of gratitude - Godspeed.