Improving Compression In Ghost

I came across Eraser from http://eraser.heidi.ie/ about a year ago and found V6 to be painfully slow when securely deleting a file. I stuck with ccleaner for securely deleting my files. In options under settings secure deletions has the following 
Options

 

Secure file deletion (number of different settings)
Wipe alternative data streams
Wipe cluster tips

 

I have mine set to
Secure file deletion (simple Overwrite 1 pass)
Wipe alternative data streams
Wipe cluster tips

 

Why?
Because when a file is deleted the entire cluster is cleared.
This is important because when the cluster is rewritten to and not fully used the cluster tip is clear.

 

Example

cluster size = 4096 bytes.
1k of data 3k zeros
Normally it would be
1k of data 3k random junk

 

This improves the ability of ghost to compress the data of the cluster.

 

I goggled wipe cluster tips and Eraser from http://eraser.heidi.ie/ was displayed in the results.
After doing some reading I found that in wiping the free space it wrote a wipe pattern to the cluster tips of active files.
Once again I found V6 to be painfully slow and almost unusable. I went into there forums and found V5.88. I created a custom 1 pass wipe which writes zero's to wipe the cluster tips (the default wipe patterns are pseudo random and run multiple passes).

 

After running on my OS or C: drive (which took about 1 hour to complete). I was impressed to find that my image of my C: drive was reduced by 1.5GB. I have a run Eraser on my data partitions as well with an average savings of between 200MB to 500MB per 20GB partition.


My questions are:
Does Norton Utilties 15.0 wipe the cluster tips when cleaning free space?
Does Norton Ghost 15.0 or Symantec System Recovery Desktop Edition 2011 have any tools to wipe cluster tips of active files?

NotaCanada