I think I got the idea from Pooniel originally. I have not seen a shaving yet (2.5 years, 120 cycles?). I remember when I put the cross bolt in the bolt was super-tight, I may have even scuffed the threads a bit it was so tight. So maybe mine doesn't have any play, or I lucked out and grabbed a high-strength bolt?
I like what Pooniel said about the clutch and high-speed. My drill must not be very strong, I use high-speed on the stabilizer jacks and when the drill stops, they are done. (Not much weight on them at all.) On low-speed, it cranks the front jack up without too much trouble.
That reminds me of another nice-to-have and the dealer might throw them in: stick-on levels
. I use one on the tongue and one on a rear taillight. Of course, I did not get them perfect, so I spent some time leveling the trailer in the driveway with a contractor's level, then noting where my cheapo levels were at. "It's good enough for who it's for."