When I first called Steve Bell to let him know our intent to apply for RAA registration for our RV9a, Steve read me the riot act (and rightly so because of the RV7a etc).
Steve told me that was what they were doing with the RV7a. Refusing reissue of registration until it could be proved it was legal. He also told me any certified aircraft, like the Cessna 150, he would now only except the factory's certified weight of that aircraft.
Our 9a being a kit built. He would not except our 9a for registration, that was until we supplied a letter from Van's Aircraft, stating they know of some of their 9/9a kit's, being built down around the 900 lb (409 kg) empty weight, and being registered in the 1320 lb (600 kg) LSA class. We also supplied a LAMI's weight certificate of our 9a.
This is true !!! And with the spotlight on us, I'm going to be making sure if I add anything at all, I'll be removing the equivalent weight from else were in the aircraft first.
On this subject. It is a lot of hard work to get an aircraft down in weight while you are building it, but very easy to increase it's weight (much like if you yourself was overweight, and spent months getting your weight down. only to stop at the bakery and blow all, or most of that hard work). Vans Aircraft lists the expected empty weight of an assembled kit RV9a as being 1028 lb (465). There are more RV9a's registered over this weight than under. Some of these more than a 200 lb (90 kg) over this weight. Which shows how easy it is, if your not careful, to build a kit or plan's built, and finish up over the manufactures listed empty weight. This is the same for an aircraft designed to meet the 544 kg or 600 kg classes. If your not careful how you design and manufacture the component's and bracket's for it while you are building it, or what you buy and bolt onto it before or after you have it into the air, you will soon push it past it's legal weight. And more concerning, its designed weight.
Bob Dennis