Just had this exact problem with an old Raleigh I was building up. Masking taped a reference point to drops at 10mm and used a large flat file to take off the 1mm required. Used opposite dropout as a reference to keep my filing flat and horizontal. Worked a treat and no problems to report.
Just had this exact problem with an old Raleigh I was building up. Masking taped a reference point to drops at 10mm and used a large flat file to take off the 1mm required. Used opposite dropout as a reference to keep my filing flat and horizontal. Worked a treat and no problems to report.