I can't answer the question, but the thought experiment is extremely interesting! If Strad by time travel could enter the VSA competition, would he then be rewarded for his genius? Or could it be his contribution would be dismissed because he had developed yet another model that no one had seen before? Could it be his varnish would be found too intensely coloured, and too much filler was found to be used in the purling mitres? Would he be excluded when it was discovered that the scroll scandalously, was actually made by his son? The G-string was found to be somewhat lacking in power?
Or, would actually his genius be recognised, and in a blaze of light it was as if all the other participants just disappeared and died of shame, and he took every prize there was, (except perhaps the "luthier under 20") and disappeared back to the 18th century with a devilish laugh? Or perhaps his participation had went by totally unnoticed?