The TorkLift GlowStep Revolution Scissor Steps part # TLA8003 which are a fit for a 2011 Heartland Greystone 32RE will work with an entry height of 25-1/2" - 36". The accordion style hinges on the steps combined with the adjustable landing gear legs are what allows the steps to accommodate this wide range. That said, the TorkLift GlowStep Revolution Scissor Steps part # TLA8004 which has an entry height range of 32-1/2" - 44" will also work as well and will allow for more error when parking... view full answer...
Since your doorway width and threshold height is both 29 inches the Lippert SolidSteps you'd need would be the part # LC791573 which matches that perfectly. If the bubble on your level is with the two lines like you mentioned then your trailer would be level enough. view full answer...