If you search the thread Royal Crimson Cherry (aka 6GM25, Royal Fran) There is more information on it that Stan provided on May 2019. Photos of my graft are included with Wickson/Burbank cherries on it, grafted three months earlier! The tree and graft growth is stunted in my yard, 6 to 8 inches per year although cherry production is good. Unfortunately there was no CRFG exchange this year due to Covid.