Dual Diary Recon+Unknown Strain

Seedlings are growing well. The "ReCon"(which we know is likely not recon but til I can identify it we will keep calling it that) broke its shell much later than the unknown(likely Northern Lights x Skunk) but both are getting along just fine. Had some issues with light and space but I fixed it. Will be transplanting soon as they are definitely solidly rooted now. Next pots are 1 gallons then 3gals.(maybe 4 or 5 not sure the actual size) I do realize I dont need to transplant alot but I don't want them growing too quick too fast as I have a spacing issue atm. My 4 photoperiod plants in bud (diary NOT included as i started them before learning about this site)are taking all the room I need and my 2 Short Rider (diary included here at GD) are starting to be space hogs as well. My plan is to have these 2 seedlings ready for 5gallons by the time the Short Riders finish(hopefully lol). If anyone has advice on mainlining I would really appreciate it. Ive never done it but of the plant I hope is NLxSk then I want lots of it. Lol. Also I'm not sure if its possible but I want to close it for sure so if I can't mainline AND clone ill figure out an alternative. Happy growing from Canada. OneBakedWalrus