Aimpoint Comp C3 Mount question

[lockandloadllc]

Hi,

I just bought an Aimpoint CompC3 for my new Stag, but I have no idea how high of a mount I need. I want it to be as low as I can get but be at a proper height. Id like to rest my head on the butt stock like when I use irons. I am thinking of getting this.

http://dsgarms.com/index.cfm?fuseaction=product.display&Product_ID=1961