Offensive line calls

coach I have purchased your offensive line,installing the option, drills,and spread option manuals, I also have your DVD's on o line and the series on installing the option, option on me, mid line, and load. I can't tell you how much I have enjoyed them. Thanks for your commitment to this great game.(you can pay me later) My question is this. when the lineman are making there calls does the defense ever start to pick up on the calls and if so how do you change them up? thanks again, I would love to come out and spend some time with you during spring practice. I have a friend that lives near Austin and I think you said in one of your dvd's that you were in Austin. I am a volunteer coach and coach the offensive line.