The "Stage Hand" by Lap King (a review from a Lap Steel Guitarist in Nashville)

Standing Up While Playing Lap Steel

Standing up while playing lap steel and dobro is pretty much an expectation for every slide player. Players and Gary Moors, Bruce Bouton, and Jerry Douglas have made it a standard for playing the instrument. The Stage Hand is a great way to start with this. The learning curve isn't too long if a player isn't used to it. 

Installing the Stage Hand

Performing

Performing with a lap steel standing up is much more visually pleasing. It also allows the player to feel more connected with the other musicians and the audience. If you are a pedal steel player btw, most bands will expect you to be able to play lap steel and dobro. The dobro is easy to play standing up as long as you have a guitar strap but most lap steels need an additional feature much like the The Stage Hand.