interesting, going with the hex pattern, i considered doing something similar with the fair haven, but the aztec pattern as a whole only.
didnt like it too much because it didnt flow like normal paneling, what youve done looks good.
as for your nacelles, i would recommend keeping the overall shape from the sovvy style, as it looks like this is a sov-esque ship.
just change around how the field grilles are and the bussard collectors.
keep it up