I have a Simmons 3-9x50 Blazerscope that I am putting on a Winchester 30-30. I have been looking at the Butler Creek Blizzard see-thru scope covers http://www.butlercreek.com/adtemplate.asp?invky=6028498&catky=1150335&amp ;subcatky1=4548832&subcatky2=2000245, and I was wondering if anyone has or now uses them and what you think/thought about them. Do you think that getting both in yellow would help to make the vision sharper?