Hello Georgio,
Thank you for your answer I'll have a look tomorrow at your sample, but I do not agree with you:
"Checkboxes are not rendered for boolean values in columns with a column template"
This doesn't mean that templating on a boolean column (using its value in the template) will not work if renderCheckboxes is enable. In fact, it clearly suggests that the checkboxes won't be created (I agree) but that the template will be applied, and it works if that column is not used by the template (which is in my opinion useless). In fact that sentence indicates more that if renderCheckboxes is true and a template is on a column then that column will use the template (weither the template contains that column name or not) and not the checkboxes aspect.
Best regards.