They need not bring anything, just keep testing.
they get 5-6 runs of wind tunnel a day and 33 item on cfd a day. Both are vastly under used. 5 to 6 runs a day (20 min a run) would be about 12 hrs of testing a week. This in comparison to 2015 when wind tunnel testing time was restricted (by more than half of 2014 season) was 25 hrs a week.
Aston if they want to breach, can do a lot in the wind tunnel.
Gear box, suspension, all seems to need work, and money allocation can go a long way
They could also onboard staff from other teams with some generous signing bonuses

