If i wanted numbers on a wing,i would get a microlight.look what happened with them.they became far to dear to buy and run.i think the only people who want wings with reg,are those who would profit from it,if ppg went the same way you might as well just fly a microlight,what would come next mandory reg/insurance yearly fees,transponders,before you know it another sport for the rich..keep ppg as it is,,