There are two GE-7s and GEB-7s Boss have made. The New Version GE-7 has 3 Opamps while the Older Vintage GE-7 and GEB-7 have 4 Opamps. You must open your pedal to see which kit you need to order. Use the Pull-Down Menu to select the correct kit for your GE-7 and GEB-7. The Vintage 4-opamp GE-7 PCB will look like this. The New 3-opamp GE-7 PCB will look like this. The mod will not work with the older GEB-7. Make sure your GEB-7 pcb looks exactly like this.
As of 2020 Boss are making surface mount (SMT) versions in Malaysia. The SMT versions cannot be modded. So just make sure the version you have matches one of the two pcbs listed above.