[Suggestion] Interdimensional capsules.

[Poxorosa]

Its gonna be rideable entity. In this capsule, u can select dimension in which she will fly. After that, u must charge capsule and press teleportation button. U can store items in the capsule, select dimension and coordinates. When u teleorting to another dimension, this capsule wil teleport with u.

[eyeonus]

That sounds like a horribly over complicated idea that doesn't suit this mod in the slightest.

[lehjr]

Sounds like what you're looking for is a Galacticraft or Advanced Rocketry.