New Post: Create list from template

Did I mention I'm coding by the skin of my teeth?
So to get around my issue with not being able to add columns to a list programatically, I created a list along the right lines and saved it as a template.

BUT - when I open a list based on it to try and find the template ID, view source, search for ctx.listTemplate as I googled, it comes up as "100" which is the standard custom template right? So how do I create a new list based on my template "MyListTemplate" ?

thanks :)