Can the Service Activity Codes of Estimate Lines be Updated Either in Depot Repair or the SR Charge

When creating an estimate in Depot Repair we have used the select parts functionality - this is a very popular piece of functionality as the parts can be selected easily from the BOM. However, when they are imported from the HTML screen, or indeed an estimate line is created manually, there is no opportunity to select the SAC. Everything defaults to the value as defined in the Repair Order Type setup. As only one Material, Labour, Expense SAC type can be selected for each Repair Type then that 'default' SAC is carried into the Depot Repair actuals and upwards into