In answer to an offline question about testing or falsifying this 5th force hypothesis without the expense of heavy isotopes of palladium – one option comes to mind just now.
Remember the “bubble fusion” experiment of Rusi Taleyarkhan? He was vindicated in his use of the very heavy element Californium as an accelerant for fusion (it’s been a long time but his name is still in my spell-checker, along with bremsstrahlung :-) Well – the heavier and more neutron rich the element used, the more likely it would be to have a surplus of neuglu bosons – at least as I understand it. Californium would not decay fast enough to help on its own in terms of anomalous energy – but it could supply a steady source of neuglu to fuse deuterons in other ways - which would then provide the thermal gain in many types of experiments including electrolysis and Arata-type. In fact, Rusi used an amount so tiny it should not have mattered, expect to his jealous peers. Yet the Cf was beneficial – and the reason could and probably did relate to neuglu. Cf is not cheap or available however. As Bob Cook implied from a recent IE article – there could be some of the same magic with U, a bit lighter … but if cost is important - by far the most economical thing to do for a potential neuglu source is to cannibalize a few smoke detectors for the Americium. There are vids on YouTube to show you how to remove handle the stuff. But even in micrograms, this is risky business and I am not advocating it.

