Diagrams of fan inverted V antennas usually show the elements quite close together and parallel. Anyone experience of, or insights about, spacing elements at say 90° or 120° around the tower to guy it? Would plan to keep the two elements of each dipole in the same plane.
This is doable — and maybe even preferable, since it reduces the interaction between elements, making it easier to tune one band without messing up the others — as long as you don't care about the directionality being different on different bands, and the more complicated feedpoint arrangement.
XQ6FOD describes such a build here (in Spanish, but machine translation does a decent job on it). You could make it smaller by omitting the 80m element, but be aware that the 80m element in this design also provides the resonances on the 17m and 12m bands (5th and 7th harmonics respectively).