Unable to fit the tube

I am unable to fit the short red tubes in on the platform. All of the other ones went in really easy, but these ones seem to be too small. Any suggestions?
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My team had this issue. A few we were able to brute force. The one we couldn’t we used a heat gun on the tube for a few seconds. Slid right on. If you don’t have a heat gun, we also tried dremeling the inside of the tube a bit to get a start on it to push it on. Hope this helps.

We also had this problem- exactly the same actually. The short red tubes had a slightly smaller interior diameter than any other others. We solved it with some lithium grease and a rubber mallet. Not the best, but it worked.