I need to get a cheek piece on my rifle. I have a Ruger M77 mark ii with a vortex 50mm objective. I looked at a few adjustable cheekpieces online but I'm to cheap to drop $60-100 on something that has less the $5 worth of material. Anyone have any good homemade cheekpiece ideas? I would like it to still look decent and be able to hold up in the mountains. Thanks!!