Hi Kelv

I was in the same situation as you as i have 6 Defi's that do everything but my Speedo, rev counter and fuel guage are fcuked and as i didnt need all the stack features i was going to have just a Single 80mm style one with a seperate fuel guage

But to be honest for an extra whatever it is the basic Full stack isnt much more and you can still use things like the oil temp but for say your gearbox oil insted of the engine

I also have a water temp Defi that is before the water is cooled and the one that is on the dash is after its cooled so that can be used on the stack to keep 2 readings, before and after

not sure what model mine is but Goldbum will be able to tell you

hope that helps