I reached out to Lippert to confirm that you can change out your 24-1/2" rear jacks that come with the 4-Point Lippert Ground Control 3.0 # LC358590 with the Short Left Rear Leg # LC342610 and Short Right Rear Leg # LC428493. They confirmed that there will not be any issues with the control board and the shorter jacks. These jacks are 2" shorter at only 22-1/2" tall and still have the same 12-1/2" of total lift as your current jacks. view full answer...