Keep in mind that mode 1 and 2 are totally different. I few my friends that had a different mode and I about crahsed his plane not real funny then, but it is now. I told him that I would stand beside him and talk him through it. He did great!!! As far as the crystals, I am with the other guy it should work with the same brand, even if they are different put it in and do a very long range check.