I'd also be content for such a creature to have Might up to what you were able to put into the device.
So if you managed to create a device that cast a CrAn effect to grant you control over a Might 10 drake (with appropriate requisites), then sure-- but that's a Fire-and-Forget Drake, in that it won't leave any vis behind. I would have to see how it affected play to allow the creature to recover Might over the course of its duration. To be honest, the effect makes a normal Might 10 drake, and such a drake would recover Might given time and the appropriate environment, so I'm inclined to allow it to do so, but it would need the proper environment.
If it came from a device, and that device had additional levels invested for Penetration, I'd probably add them to the drake for the purposes of its powers.
This would be a seriously powerful effect (for my table, I know others like playing at these levels, but I don't spend a lot of time at this power level), just eyeballing the level...
CrAn 50 +1 touch, +2 sun, (No change for size, so it's easier) +3 Requisites (Re, Ig, Vi, as the spell could just make a drake, but it is a significantly "less" drake without Might, Fire, and the ability to control the drake) +3 for +15 Might, and shoot, +1 for +10 Penetration...
That'd be:
Egg of the Expectant Drake
Cr(Re)An(Ig, Vi) 105
R: Touch, D: Sun, T: Ind
This egg, when activated, creates a large drake (Size +1, see RoP:M, page 75), with the additional ability of Penetration (Corpus) 10. The drake obeys the commands of the person who activated the egg, existing until the next sunrise/set.
The device could be made a one-shot for a lab total of Cr(Re)An(Ig, Vi) 106, with no vis.
For that, let's just start with a CrAn total of 50, an Int of +5, a MT of 15, an aura of 5, an apprentice (or assistant) with an Int of +4 and a MT of 5, a familiar with an Int of 1 and a MT of 5. We'll say S&M of an egg (+5 for creation, which I can't believe wasn't defined before, but that's a solid number for me, if you hate it, do an egg-shaped container, and the dragon starts within it and pops out +5, ArM5 p110) and emerald (+7, ArM5 p110), which gets us to 102.
So, if you'd created a spell
The Stepping Stone Drake Summoned
Cr(Re)An(Vi) 75
R: Touch, D: Day, T: Ind
Create and control a Might 0 drake for a moon. No fire, please.
CrAn 50 + 1 touch, + 3 moon, (No change for size, so it's easier) + 2 Requisites (Re and Vi)
This would add +15 to the total. And then you'd be at 117, and if you did it for a 70 year expiration after the first use, you could have 5 uses. You could create that spell in 5 seasons.
You might be able to add a couple of laboratory improvements to hit it without the spell, or if you were willing to forego the Penetration.