@noromance, get yourself a Zeta arm! There is something about it (not just effective mass) that makes it about the best mate for Deccas and Londons.
@slaw, I've been dealing with the increasing frequency of my lifelong "cluster" headaches. Consider yourself very fortunate if you've never had one---they're completely debilitating. I have my entire adult life suffered from them about quarterly, but lately they've been appearing weekly, if not twice a week. They always start right above either left or right ear, moving across my head in about three days time. Rather than being like a migraine (of which it is a relative)---constant pain---the cluster strikes like a bolt of lightning, intense pain coming out of nowhere. The next strike may be a few minutes later, or maybe only ten seconds. So one is always poised for the next strike, tensed and anxious.
My doctors have been trying some medicines on me, and I have to do the sleep apnea test next week, seeing if that's the cause. I doubt it, but I'll give it a shot. It's getting brutal being me ;-( .