you should be able to move the arm - with some effort.

Grease it and slide!! If I'm not misteaken the check straps pop from one detent to the other (door half open to full open) without slamming your shins.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!