Glow plug timer mod, what glow plugs?

[Lemo79]

ummmm now i'm confused, my 3L direct injection engine does have glow plugs, they are located under the intercooler I can see the bus bar running to them, and 4 rubber bungs at the top of them

Yes they do, I am going to do the mod when I get off my but, when I do though I was going to maintain the ceramic plugs or replace with ceramic plugs as I thought the idea of the timer was to prolong the life of the ceramic plug. My understanding was the ceramic plugs were only loosing tips due to being on for the 5min and being blasted by the injectors during that time. Better safe than sorry though, but do you need to do the timer mod if you replace them with metal tips?

Lemo.