i had the s3000 and sold it to buy the dx3000. i think the dx3000 will fit and you will be able to stand up and just buy the plastic roof supports. i use 3 of them to push the curve up in the roof.
shappell is out of stock on the tent for this season. they are made in china and must have sold out what they had ordered.
the difference also is screws near the top corners that keep the long rails from slipping over the top corners. this is needed to keep them in place while the roof curve supports push on them.
i added the ski kit and later built a smitty sled. they are hard to move while set up with the ski kit under it. adding another rope would be better than using the one thats meant to pull it while closed. just add one end to each half for that rope.