I just picked up an interesting plane. It is a J Roberts Cobra. Looks like A P-39/63 but the fellow that built this one decided German markings were in order. Trike gear and a 38 in wing. It is fitted with the 3 line belcrank and the plane has never flown. It came with Plans/instructions(not really plans) and the most notable thing I can see is there is no center sheeting. Anyone who can she dsome light as to how old this plane might be or any info really will be greatly appreciated.