Now, returning to the safer topic of comparative linguistics, I still am trying to account for how my new solution concerning the prehistoric genesis of Proto-Indo-European's uvular sounds helps (or maybe hinders?) my attempts at trying to figure out the origins of the emphatic particle *[ǵ/g](ʰ)[e/o] which is thus far so hideously reconstructed by current Indo-Europeanists.
However, if we take the velar contained in the nominative first person singular pronoun, which appears to contain the fossilized remnants of the earliest form of the emphatic particle when the pronoun was first coined in the Late Period (ie. *h₁eǵoh₂, literally "(as for) my being here" from *h₁e "here" + *ǵe [emphatic] + *-oh₂ [old 1ps subjunctive]; parallel in development to the 1ps pronouns of Inuktitut uva-ŋa, Aleut ti-ŋ, and Proto-Semitic *an-āku), we are pointed to *ǵe as the most appropriate reconstruction. Any other forms of this particle would then have developed later after presumably being influenced by or merging with other existing words or particles with similar phonetics and meaning. In the earlier Mid IE (MIE) stage, we could then posit an emphatic particle *g̰a derived from Indo-Aegean *k’ə. From there, if comparable to Uralic emphatic *-ka attached to some pronominal stems, we might finally reconstruct a Proto-Steppe emphatic particle *k’ə to account for both the Indo-European and Uralic forms. Can you all swallow that? Granted, this all remains tentative for now, but it's worth a shot.
Considering the differing velar stop in the emphatic particle, the verbal extension with uvular stop, seen in PIE verbs like *yeu-g- "to join" whose *g-less counterpart has identical semantics, must not be related afterall as I had previously assumed. Instead I'd like to suggest that it derives from a Mid IE aspectual marker *-ɢ̰a-, which originally might have conveyed a perfective sense. This implies earlier Indo-Aegean *-k’a- (thus Etruscan -ac- [perfective] as in tur-ac-e "was given") and relatable then to the Uralic perfective in *-ka. In this case, a Proto-Steppe perfective suffix *-k’a would be in order to explain the later forms.
That so far is my solution concerning that. Let's see if this idea sticks.
 Fortescue, Language Relations Across Bering Strait (1998), p.113 (see link) confirms Uralic emphatic *-ka.