picking a fast craft (let's say icaras ^^) is interesting regarding the boost effect. I mean icaras is made to fly high and fast, as an example i don't see a very significant difference (there's a little one however) when i fly feisar or icaras on modesto forward for phantom speedlaps, except when i try my crazy boost before the big bump, it's significantly faster with icaras. At slow speed i find icaras clearly faster on the flat, but it can be psychological !