Thanks everyone for the replies.
While I also think that kundalini into the brain is a must for full enlightenment, I wonder if by awakening the penetrating vessel (the spine), it will rise on its own or even for a complete open energy body it will need special practices to go up. Also it will be interesting to know if just the entering of chi into the central channel, free flowing, and not the kundalini, will give some kind of spiritual fullfilment. I would appreciate if anyone with experience in this regard can 'enlighten' me.
Anyway, this is only for curiosity, as for now I feel I don't really need kundalini and will be more than happy just without blocks, that to me will be enough for the interior peace and perfect health that I'm seeking.
You're probably right Marblehead!
As for the coming of blocks... on what it depends? Maybe the thoughts and negative beliefs one keeps having and storing into the mind that manifest themselves as blocks in the meridians? Anyway I think one eventually will get to a point when there is no other block, to be hollow like a hose... I've learned how to get there, and I'm enthusiastic for it!