My SD is only 8 months old so I can't speak from the perspective of having an adult snake but she is around 5' now and is amazing. Her parents were wild caught Kalatoa 5'dad and 6' mom and I'm guessing mine will end up around 6-7', maybe even 8' at her growth rate. I would guess with close to 50% mainland blood the one you're looking at stands a chance to get larger than 10'. I would ask reptile experts on here. He's also got a bunch of great SD related videos up on YouTube.
I will say that my retic is very fast and very curious. A little cage defensive when first getting her out but she's a puppy dog out of her enclosure. Always on the go and super enjoyable to work with. Definitely keeps me on my toes
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Glad to hear you're enjoying her, I fantasize about a first SD some day, so I've been following your posts. How is her poor little face?
1.0 Central American BI: Irwin
0.1 Jungle, het snow BI: Gimel
1.0 green albino, het granite Burm: Dr. Waffles
1.0 Betta fish: Convertible
1.1 cats: Tipitina (Tipi) and Professor Longhair (Fess)
0.1 Egyptian baladi dog: Toasty