Giedo van de Garde: Last year it was a little too dark, which sometimes didn't look good on TV.
Dutchman recently dismissed rumours former Caterham racer Kovalainen was set to replace him later in 2013.
The E21 demonstrated strong potential using both tyre compounds. Heikki was quickly up to speed.
"This is the state of Formula One right now where unfortunately sometimes the budget plays a large part in your decision making." - Tony Fernandes