HTML templates for reports and workflows

For our use case we require printing reports on preformatted and printed paper, it would be really convenient if we could generate a report that had all the content in exactly the right place (i’m talking sub 0.1mm) precision. This is simply not doable with a google doc template if it is first converted to HTML and then to PDF. We currently solve this by using our own HTML Template with some CSS and wkhtmltopdf that puts everything in the right place for printing. It would be very useful for us if I could point appsheet to a .html template file on Google Drive and have the google docs to html conversion step skipped and instead directly generate the html for wkhtmltopdf from the template.

Kind regards,