I find 30 inch shafts to play a bit odd, they seem to throw the ball off course more for me, especially on slow spin drag type shots. I use a 30" butt and a 29" shaft, find that to be just about a perfect length.
Pechauer will make you a custom 60” cue with a 30” butt and shaft, likely within a couple months. I waited 3+ years to get my custom ordered Mezz Exceed 60” cue, also with a 30” butt and shaft.