No artifact testing or research outside the
hell-pits research facilities of the Apocalypse Lab complex (and, by the way, that is
especially true for the glowworm gun testing). I probably wouldn't mind some help with testing via QEC-bodies, since the Science Teams were probably anyway going to use them extensively, but there are certain caveats with this.
First, unless Hephaestus staff will (finally) be paid for all the hard work, neither the people outside Hephaestus should be. I'm not talking about Tinker-benefits - even Tinkerers aboard the Sword get those, so that's not it; I am talking for straight-up token salary for doing the same things you want from non-Hephaestus residents, only for free and all the time around. We 'kinda' have the planet's resouces at our disposal, yet in reality we are getting nothing from this thankless job (except for personal satisfaction, of course - we could just pay volunteers with that, if you wish
).
Second, there is a reason why QEC-controlled bodies were limited to Hephaestus use: Piecewise really doesn't want us to be in two places at the same time. So unless you deal with him on that (and if you do, that would open a whole can of worms, like the Gestalt which are currently aiming for that, which was previously clearly denied), this avenue would be closed.
Unless the person in question is a very determined General that wishes to meddle in Hephaestus affairs from afar. As a rule, the characters have not been allowed to do stuff both aboard the Sword and on Hephaestus.
Third (and finally), in direct continuation of the second point, as we both know so well (and you actually mentioned), artifact testing and research is a risky business. Not so much for the researcher (if the correct precautions were taken), but for the artifact itself. A certain bar of trust and realiability must be passed - so, all in all, only the applicants approved for this research by the Hephaestus Administration could be allowed to conduct the testing - which is, coincidentally, the same procedure as with them actually visiting the place.
All in all, I have a counteroffer: we rescuscitate Syvarris and PyroDesu from stasis-catatonia, and once again offer people to come to Hephaestus as temp-assistants. Then people apply for Hephaestus stay and work, we review and send personal invitations, and then we finally have extra help for Hephaestus.
As for Leo - I've discussed this with Devastator, and there was this idea of Maurice visiting Leo. Of course, the idea came when the mission preparations were done, so we had no proper time for this sort of interaction; still, it might give interesting results.
Also, I don't think he had "years in solitary" to think things over - I'd think that he has been in stasis for most of the time if not all, like the convicts aboard the Paracelsus Sword, to preserve him 'fresh', - so probably not so much subjective time has passed for him. However, and this now might be an idea, we could
actually let him pass away some years awake and conscious, out of stasis, so that he'd finally have that "ample time to stew", with all the possibilities that entails.