The Manta is a bigger heavier unit than the FD and I haven't ridden it BUT in principle this video will help . You need to center the mass to balance the board not move it back. Manta has also upgraded it's prop and motors . I 100% recommend you upgrade as this will help heaps on the start. The Omen 72L should be fine but those lager fuller nose boards can plow water on the start. The 1180 should also be fine if you are getting boosted try a negative shim. Just practice smooth calm flat water until you have the starts nailed. I've also included one of my start videos , sort of a 1,2,3 start. See if you can get your hands on a Skinny Sup DW board , they are super easy to practice starts , like the purple Duotone in my first video.
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