What are the pros and cons of mechanical v electrical etc ?
and which are easiest to fit ?

(I want a boost, oil press & temp)

If you get an oil leak in the cabin it's not going to be fun!!!
Elec gauges are safer and easier to fit. IMHO!

Iain.

Nothing complicated about fitting capillary tubes. I can see your point about leaks though. Personal choice though. I went for capillary.