Just wanted to know if someone has had a similiar experience. I am on my 4th period of Limdu for the same condition Lumbar back problems (original MRI showed L4-L5 heriniation and L5-S1 herniation with nerve root compression). Have had a discectomy of L5-S1 and more recently a L4-S1 lumbar fusion. Was found fit after discectomy until I did PHA (as ordered by UMO to return to Sub duty) then had fusion because of reoccurence of symptoms L4-L5 herniation became more severe. Just had left knee surgery plica removal which ortho says was partially due to my back because I was walking messed up for over 2 years. My LIMDU re-eval is next month. I thought I was going to go to PEB after 3rd period Limdu but was granted a 4th. Now I am again thinking PEB but is it possilbe I could get a 5th period of Limdu? I have 13 and half years of service and am really tired of the LIMDU limbo.