Most of the stuff uploaded on SinlessLinks has a recovery record that can be used to fix Broken files.  If, for some reason, your download has broken/missing parts and you try to extract, Winrar will give you a CRC Error.  This is frustraiting and you could try to download the part again or use the Recovery Record to repair the files.  Here is how.

Step 1: Open Winrar and navigate to the folder containing the *.rar files.  If you open the first file you can navigate to the folder using the up button.
 

Step 2: Highlight / select all of the files associated with the archive and click the REPAIR button.  This will take some time.

Step 3: Use the repaired files to extract the previously corrupted content.  The files will have the prefix "rebuilt." added to them.

Note: Most of the time there are only 1 or 2 corrupted files and there is no need to repair the ones that are OK.  To do this, you must know which files are bad and select those files and repair them. Once repaired, delete the original files and remove the "rebuilt." prefix from the repaired files. Finaly, extract as usual.