If you could post more details next time, it would help those of us trying to help you.  "my car is proving to be more difficult to drive" doesn't give a mechanic much to go by.  I bet you'd pay a lot to have that car fixed.  :)

The Shipping Address IS ALREADY the address on the Delivery Slip:

1. Sales Order:

2. Delivery Order:

3. Delivery Slip:

You just need to add something like this to your own view that inherits and overrides the default Odoo view report_delivery_document:

<div class="col-xs-4">

  <div>

      <strong><span>Ordered By:</span></strong>

  </div>

  <div>

      <div t-field="o.sale_id.partner_id" 

      t-options="{&quot;widget&quot;: &quot;contact&quot;, &quot;fields&quot;: [&quot;address&quot;, &quot;name&quot;, &quot;phone&quot;], &quot;no_marker&quot;: True}"/>

      </div>

  </div>

  <div class="col-xs-4">

      <div>

          <strong><span>Invoice To:</span></strong>

      </div>

      <div>

      <div t-field="o.sale_id.partner_invoice_id" 

              t-options="{&quot;widget&quot;: &quot;contact&quot;, &quot;fields&quot;: [&quot;address&quot;, &quot;name&quot;, &quot;phone&quot;], &quot;no_marker&quot;: True}"/>

      </div>

</div>

That will give you something like this:

Thanks for your reply.

Sorry, I was not aware of any other information that you'd need to answer my query.

Funnily enough you managed to answer my question anyway, without any further information.