my $destination_type = $::form->{type} eq _sales_quotation_type()   ? _sales_order_type()
                        : $::form->{type} eq _request_quotation_type() ? _purchase_order_type()
+                       : $::form->{type} eq _purchase_order_type()    ? _sales_order_type()
+                       : $::form->{type} eq _sales_order_type()       ? _purchase_order_type()
                        : '';
 
   $self->order(SL::DB::Order->new_from($self->order, destination_type => $destination_type));
 
   # change form type
   $::form->{type} = $destination_type;
-  $self->init_type;
+  $self->type($self->init_type);
+  $self->cv  ($self->init_cv);
   $self->_check_auth;
 
   $self->_recalc();
         action => [
           t8('Sales Order'),
           submit   => [ '#order_form', { action => "Order/sales_order" } ],
-          only_if  => (any { $self->type eq $_ } (_sales_quotation_type())),
+          only_if  => (any { $self->type eq $_ } (_sales_quotation_type(), _purchase_order_type())),
           disabled => !$self->order->id ? t8('This object has not been saved yet.') : undef,
         ],
         action => [
           t8('Purchase Order'),
           submit   => [ '#order_form', { action => "Order/purchase_order" } ],
-          only_if  => (any { $self->type eq $_ } (_request_quotation_type())),
+          only_if  => (any { $self->type eq $_ } (_sales_order_type(), _request_quotation_type())),
           disabled => !$self->order->id ? t8('This object has not been saved yet.') : undef,
         ],
       ], # end of combobox "Workflow"
 
 =item * custom shipto address
 
+=item * check for direct delivery (workflow sales order -> purchase order)
+
 =item * language / part translations
 
 =item * access rights
 
     { from => 'sales_order',       to => 'sales_order',       abbr => 'soso' },
     { from => 'request_quotation', to => 'request_quotation', abbr => 'rqrq' },
     { from => 'purchase_order',    to => 'purchase_order',    abbr => 'popo' },
+    { from => 'sales_order',       to => 'purchase_order',    abbr => 'sopo' },
+    { from => 'purchase_order',    to => 'sales_order',       abbr => 'poso' },
   );
   my $from_to = (grep { $_->{from} eq $source->type && $_->{to} eq $destination_type} @from_tos)[0];
   croak("Cannot convert from '" . $source->type . "' to '" . $destination_type . "'") if !$from_to;
 
+  my $is_abbr_any = sub {
+    # foreach my $abbr (@_) {
+    #   croak "no such abbreviation: '$abbr'" if !grep { $_->{abbr} eq $abbr } @from_tos;
+    # }
+    any { $from_to->{abbr} eq $_ } @_;
+  };
+
   my ($item_parent_id_column, $item_parent_column);
 
   if (ref($source) eq 'SL::DB::Order') {
                transdate => DateTime->today_local,
             );
 
+  if ( $is_abbr_any->(qw(sopo poso)) ) {
+    $args{ordnumber} = undef;
+    $args{reqdate}   = DateTime->today_local->next_workday();
+    $args{employee}  = SL::DB::Manager::Employee->current;
+  }
+  if ( $is_abbr_any->(qw(sopo)) ) {
+    $args{customer_id}      = undef;
+    $args{salesman_id}      = undef;
+    $args{payment_id}       = undef;
+    $args{delivery_term_id} = undef;
+  }
+  if ( $is_abbr_any->(qw(poso)) ) {
+    $args{vendor_id} = undef;
+  }
+
   # Custom shipto addresses (the ones specific to the sales/purchase
   # record and not to the customer/vendor) are only linked from
   # shipto → order. Meaning order.shipto_id
                                                      )),
                                                  custom_variables => \@custom_variables,
     );
+    if ( $is_abbr_any->(qw(sopo)) ) {
+      $current_oe_item->sellprice($source_item->lastcost);
+      $current_oe_item->discount(0);
+    }
+    if ( $is_abbr_any->(qw(poso)) ) {
+      $current_oe_item->lastcost($source_item->sellprice);
+    }
     $current_oe_item->{"converted_from_orderitems_id"} = $_->{id} if ref($item_parent) eq 'SL::DB::Order';
     $current_oe_item;
   } @{ $items };