Evening,
Nugs defines mainlining as "building a "hub" off of a single node creating a "manifold" for equal energy distribution from the root mass to the growing tops". His thread is awesome, check it out.
The Main-Lining Thread - Nugbuckets
(I know I spoke about this in your other thread, putting here just for the sake of others mate)
A plant I'm working on at the moment.
If you want one cola only I would imagine you would want to do as others have said, don't top, pull all suckers as they appear and such... I haven't done it personally as I think it would be counter-productive for me.
Peace!