Aircraft Profile Page
Manage > Aircraft > Select Aircraft.
Share aircraft report with: Select users. This way these select users will be able to view aircraft specific reports and not all aircraft reports, if you have more than one.
You can also select: Send Maintenance Reminders and Squawks to these users. This way they will get aircraft specific Maintenance Reminds and Squawks, if you have more than one aircraft.
You now have the option to add a second engine as well as Tach 2 and TTAF.