Insert and liner connector question

[tkirk22]

I'm wondering if there is a better way to couple my insert to my liner. I'm using a forever flex liner and their appliance coupler. As you can see from the photo my block off plate is fairly close to the stove so there's not a lot of wiggle room.

I haven't tried to pull the stove yet but I believe I would have to loosen the connections at the top and pull the liner up 2" to free the stove. There must be a better way. Is there some type of telescoping connector that would ease stove removal?

 

[BrotherBart]

The big question here is why you would ever want to remove the insert?

 

[tkirk22]

See my other post about the manometer. I would need to weld a fitting on the connector and plumb a sensor line under the stove and down the old ash chute. That would require stove removal and it would be easier to put a better connector on now rather than after I finish the top cap. I also want to add an adjustable gate valve on the secondary air at some point.