I actually use something very similar to these except I use the 1x1 modular engines instead of the old medium ones. Yes they're more effort to setup initially but they do tend to have slightly better performance with regards to both power and fuel efficiency. I like the layout you've chosen for the outer casing that you use for them though, so I'm definitely going to be stealing that for my own creations going forwards. ;) * Edit - fixed a careless typo
