I also used a small voice recorder I picked up from Dick Smith. It required no mods as you can group a large number of recordings on one Folder. So in one folder I have all of the schedules on individule recordings, so for every time I hit play, it will call one manouver then stop, the next time you hit play, the next one is called. I have it fitted on an angle to the back of my TX with velco, and so I can find the very small flat play button, I put a small piece of velco to it. It did take a bit of practice using it, but now it is almost as good as a caller, and needed no mods:-) Matt13