I have also chosen my usual Pure Tone multi contact jack socket for this very reason too, featuring an extended thread length as standard to help mounting that little bit easier. I have chosen items like the Switchcraft 'Short Frame' 3 way toggle switch, which is smaller in overall size than a traditional Switchcraft switch, making fitting it through the f-hole easier as well as having a much longer thread length making it easier to mount up once inside the guitar. 335s are a little feared by guitarists when it comes to doing wiring work, due to limited accessibility via the thin F-Holes.
I truly hope my harness for the 335 helps bring out the best in this instrument, and hope the subtle component choices I have made help make the install that little bit easier. The 'Electric Spanish' semi-hollow body design is incredibly versatile and capable of some superb guitar tones. The 335/330 is one of, if not my most favourite Gibson guitar design. Thanks for your patience whilst I get your harness made! This turnaround time doesn't include the transit time. The current turnaround time for a harness orders is around 5-7 working days depending on quantity of orders in at the time and your order will be updated accordingly when it is dispatched. I usually make harnesses to order, due to the variety of spec options that could be chosen across the whole range.