I am using Odoo.sh in Version 18 and I want to create my own quotation pdf, but the changes I make to the table with the products don't change anything. Just to make an example, lets say i created a module with a template to change the color of the price unit: 

<odoo>
    <template id="custom_table" inherit_id="sale.report_saleorder_document">
        <xpath expr="//td[@name='td_priceunit']" position="replace">
            <td name="td_priceunit" class="text-end text-nowrap" style="color: #BCCF00">
                <span t-field="line.price_unit">3</span>
            </td>
        </xpath>
    </template>
</odoo>

If I open Studio and have a look at the sources of the report, my template is included, but at the end it does not change anything, because there is a source called

 "web_studio.report_editor_customization_full.view._sale.report_saleorder_document"

which also starts with 

<xpath expr="/t[@t-name='sale.report_saleorder_document']" position="replace" mode="inner">

and therefore overrides all the changes I made in my template. 

I can not find this template anywhere in my files (probably because it is generated in the database and is not a source file).

How can I make changes to the product table without having to override the template in Studio? What am I missing?

Any help is appreciated.
Thanks