I have an X 13 and a Stealth 14 with these new hatches in the store. I would imagine the frame is the same, although instead of the 24 rivets there are 14 thru bolts, so new holes would need to be drilled.
I like this hatch, it may take some maintenance to keep it operating smoothly, time will tell. I really like that it has an o ring on the frame and a gasket on the hatch. The hinge will make it much easier to grab something from below as well as one key to turn.
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