Script generation through psql

The bash call is like:

psql -U myusr-d mydb -f ./scr.sql > $UPD_FILE 2>&1

$ cat scr.sql

\set vl_id 19
\set ECHO none
\pset tuples_only on
\pset pager off

select script_drop from proceso_actualiza_fdw where id = :vl_id;

select script_import from proceso_actualiza_fdw where id = :vl_id;

\q

1.- The output file is like :

Pager usage is off.
 --                                                                  +
 -- BORRADO DE TABLAS MODIFICADAS                                    +

How can I eliminate "Pager usage is off." and the "+"  at the end of each row?

2. If in the psql script I want to pass variable values from an anonymous block to the rest of the script, how can I proceed?. For example

DO $$
DECLARE
  vl_id integer;
BEGIN
 -- vl_id is set inside the procedure
  call my_procedure(vl_id);
END $$;

select script_drop from proceso_actualiza_fdw where id = :vl_id;

select script_import from proceso_actualiza_fdw where id = :vl_id;

The script output file is the result set from the queries.

I've tried with \set myvar but this doesn't works

Thank you very much in advance

kind regards

Mauricio Fernández