Please can you make the account reference be linked to not only the sales order but the invoices too. I delete all my sales orders and now I am unable to use the 'Drill Around' which is really frustrating. The reason I delete my sales orders is because I like a clear screen to see which orders still need to be made and dispatched. My business is seasonal so I tend to get orders weeks in advance so really only use sales orders as a way of seeing what orders are still live.