where to mount radar dome on t33

[ambrielt33]

Would like suggestions as to best place to mount radar dome I am considering on my 1880 Tartan t33. Backstay has adjustable blocks so no single cable. Head sail is a frac rig so would it be best if mounted on mast to be above that? I have heard concerns that that would be too high for the weight. The mast would be my preference. Would rather not clutter the stern with mounting the dome on a pole? If mounted on the mast does it ever interfere with the headsail when tacking.