"Hey Pewny, how are you?"
“I’m pretty good. And how about you? Aside from apparently gaining weight?”
“Because the thicker the shell, the less and less of the vibrations can be felt through it. It’s a delicate balance, if you give it too small of a motor, you won’t feel anything. But you can’t give it one that is too big without making the whole thing bigger. And that translates to the spining weight too.”
"Ah, I see. Well, that’s good to know.”
The stallion nods “I made two as special orders some time ago. Dunno if they were well made tho, since I never got any word on it, but then, I didn’t get any complaints either.”