Sorry about that. I will explain what I found. Mounted on the frame under the slide is a "T-Bar" that rides in a channel in the slide to keep the slide aligned. Unfortunately, there is a step in the channel that reduces its width by about 1/4" on each side when the slide is retracted about 6". If the slide is slightly misaligned, it will catch on the T-Bar creating a hard mechanical stop. When this happens, I can use a crowbar in there to force the slide around the T-Bar in order to fully retract the slide. I need to have an expert look at why this is happening and to find a more permanent solution. Below is a photo taken from under the slide looking a the white T-Bar. I hope this is helpful!
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