I am getting ready to do my first S12 conversion and I have questions. I want to reuse my original trigger guard. When I remove the plate that covers the new location for my trigger, what new holes do I have to drill? I have seen alot of info for the rifle conversions but I need something for the S12. I know that I could use a Tromix trigger guard but after buying an EOTECH and a bunch of other goodies, I need to save some cash. My new Tromix trigger will be here Saturday but I would like to get started so I can drop the new FCG in. Can you guys help? I included a photo to show my progress so