Hi Gnosis,

> The text has many difficulties (life also) that are hard to work out.
> Such as:
> is the j a 'z' sound?

No.

> why are there a lot of 2 vowel pairs even though it is not proper
> pali.

For example?

> If one is to memorize, must one go with one variant over another?

Perhaps.

> Where can I find each of these textual tradition for download?
>
> Thai edition

Not available for download
http://www.mahidol.ac.th/budsir/budsir-main.html

> Sixth Council edition

Not available for download
http://www.dhammasociety.org/mds/

> Sinhalese (Buddha Jayanti) edition

http://www.buddhistethics.org/palicanon.html

> any older texts such as kharosthi, or gandharan?

http://www.buddhanet-de.net/ancient-buddhist-texts/Buddhist-Texts/BT-index.htm

> I am in the process of creating a nicely organized version of the one
> at tipitaka.org

I would recommend
http://www.tipitaka.org/cst/

See also:
http://dhamma.ru/sadhu/
http://www.lioncity.net/buddhism/index.php?showforum=50

Best wishes,
Dmytro