I like it, you have a really cool design!!!!! nice page layout also! I did tinker with other engines.... but i I couldnt get it to orbit as easily..... the passenger version is much lighter than the cargo... I really like the XL size or yours. Im working on another video project now but when im done I think im gonna go back to the drawing board and try to increase the size so that it can carry more weight to and from orbit. as KSP 2 releases the colonization package to the game and we can automate our transport of resources it might end up being beneficial, that is if money is an issue, going for total reuse will make a difference. Thanks for taking a peak!