Dear Nopporn san
The 10 - 11 mm spring
OK REF try in the spring of Normal.
This place is the sizes which the designer tried for in a variety of patterns.
To change it, a great deal of data is necessary.
yuji
Dear YUUJI-san
I would like inform about pulling force of latch after bending spring for support your decision .
If you confirm. Please you select tolerance for trial 10-11 mm. or 12-13mm.
I will report after trial to you again.
Please see attach file.
Best regards,