While I cant relate to Retics as I don't own one. There's a Youtuber under the name of "drthik1" (I think CALMpythons from here actually knows him) who breeds/owns a bunch of Burms and Retics ....he swears any male can reach the size of any female. That certainly didnt reflect what I had always been told by other breeders, but after looking as his collection I believe its possible now.
I second a vote on popping. The breeder whom I purchased my male Burm from had an incredibly large clutch so I was somewhat concerned that there was a chance he just did a quick probe and missed something. A popping on my end however showed two, long undeniable red hemipenes ...so I was comforted by that. Maybe Im an odd person for being happy at the thought of seeing my snake's junk lol....but I think you understand what I saying.