Flew the 46 ARF’s again today, last time out the YS blew the stopper out of the stock tank. I replaced it with a 10 oz Sullivan flex tank which if you put it on its side fits perfectly. Some creative tube bending and with the pressurized YS system it worked perfectly today! We flew the two together for the first time today, although they aren’t meant to be race planes we couldn’t help ourselves, the YS80 appeared to everyone watching to be faster the than the one with the OS55 but to me flying the YS they were really close! Didn’t get any pics of the planes but here’s a pic of the tank install in case anyone else has plans for the YS.