Is what I do an alveolar trill?

Keith Alasdair Mylchreest wrote:

<snip>

> Well doesn't Allan say that Aristotle couldn't do a trilled /r/, so when
> asked his name he appeared to say "Alistotle" although he probably did
> the Southern English upside down [r] which his colleagues would assign to
> their /l/ phoneme.
>
> What I'm saying is that you're in good company.
All this has reminded me:
I always thought I couldn't do an alveolar trill (but I can trill my
uvula), but this got me thinking: I can do *a* trill, with the tip of my
tongue at/near the alveolar ridge, and when I trill it feels like it's
taking place in the post-alveolar or palatial position. Is *that* an
alveolar trill?