Not a good fit for the i beam carriage. they get super tensioned as you can see
Are all your Springs that tight?... With the no support version of the I Beam you loose some of your z Height. You may need to readjust the height of your Z stop to give yourself some more room.
Also noted from your Photo that the original design was for the I beam with supports. I can see it rubbing on the bottom. I will upload a design tonight with an extra 5 mm of room, so that the rubbing doesn't occur.
Have you managed to upload the correct design yet?