dopeness man! do you plan on just going f1, f2, f3 to nail down the autoflowering, or will you be doing some back crossing with your f1s to the lowryder parents?
i'm doing something very similar with some thai and lowryder #2 as well as some bagseed acapulco gold and lowryder #2, afghan x lowryder#2 and a few others even haha, most i am just going to cross with each generation but i did do some where it was backcrossed back to the original lowryder dad....fun experimenting, man i hope your project kicks ass and delivers some serious sativa goodness at your latitude!
Excellent choice of parents bro! what ACE strain is that exactly??? LR#2 will give you enough Sativa heritage to keep them sativa dominant later down the line. Looking forward to your progress.
SGS
looks like a great project i used some Ace genetics too in my autoflowering Haze/Sativa's
keep us updated and good luck
peace