In my next Viperjet which I am about to start, I am looking at completely sealing the canopy space by fitting the cockpits to the canopy & sealing any air gaps. Since the canopy on my last Viper exploded, rather than imploded, I will be adding Hysol to the front windshield. I have a suspicion that it blew in & the sudden inrush of air blasted the canopy to bits. I am getting a bit tired of fixing longstanding issues on Chinese ARF's, that should have been addressed ages ago by the manufacturers..