I did a little research after reading this thread, as I wasn't familiar with the SkyRaider. The company (SkyRaider, LLC, née Flying K) appears to be gone from the marketplace.

ADK-Flyer may be confusing two different versions of this airplane. According to this Wiki article, there was a SkyRaider II that used, typically, 50-60hp engines and had a max gross weight of 950 lbs, and a Super SkyRaider that could handle up to 80hp and had a max gross weight of 1,050 lbs.

If the airplane in question is either of those then I'd be very suspicious of anyone claiming a 1,200-lb gross weight without some solid engineering work to back it up.