Assembly of the ES35 is a little fiddly and requires a bit of dexterity. The instructions below are for a once through build but some builders may find it easier to handle the Jack Carrier sub-assemblies in smaller groups. This will require multiple removals of the front panel.

1. Start by fitting the 9x LED mounts to the front panel
2. Assemble the 18x Jack Carrier boards
3. Assemble the 4x Buffer boards
4. Mount the J101 surface-mount connector on to the TouchPad PCB being careful at all times not to mark the front of the PCB
5. Fit all components to the ES35 PCB except for the Jack Carrier sub-assemblies and LEDs
6. Fit 4x M3x12mm spacers using the 4x M3x6mm bolts for BUF1, BUF2, BUF3 and BUF4
7. Install the 18x Jack Carrier sub-assemblies but do not solder
8. Install 9x LEDs but do not solder
9. Offer the ES35 assembly up to the front panel locating the jacks in to their respective holes
10. Fit the TouchPad PCB ensuring that the TouchPad header mates properly with its mating receptacle on the ES35, and secure using the 2x M3x8mm socket screws
11. Fit nuts to all of the jacks
12. Flip the assembly over so that it is face down
13. Feed each LED in to its respective lens mount and solder in to position
14. Solder all the Jack sub-assemblies in to place
15. Mount the 4x ES35 Buffer assemblies securing using 4x M3x6mm bolts