You had better be lifting 400t minimum with this or I'm gonna say it doesn't need those boosters. Looks awesome though. Just one Hawk in the centre core would do just fine. And what on earth is a Titan doing on a small second stage?!?! That needs to be nothing other than a Frontier. Maybe 2, depending on payload. But it really looks good. Just make it not have a TWR of 2.8 please...