HOW TO REMOVE THE PART IN SOLID WORKS?
![](https://d2t1xqejof9utc.cloudfront.net/members/avatars/183185/feed.png?1432253979)
![](https://d2t1xqejof9utc.cloudfront.net/pictures/files/45746/small.png?1413774461)
I hope this helps and is what you were looking for.
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Step 1:
I re-drew it as it was hard to just fix your current model. I used the shell feature after making the two tubes with the fillets and without the end flanges. I have provided the file as well as a screen shot of the model with the feature tree. let me know if you need more step-by-step pictures or a video.