Yes, you are likely to wreck your laser! I have heard of people following the youtube vid and wasting thier lasers several times. There are some lasers with easier to reach pots and if you are careful, you can often turn the pot on these to get more output power. One of the easy to mod lasers is the LaserGlow Galileo, also many similar looking lasers from DX are good, (look for the pot showing in the un-assembeled views), but I prefer the LaserGlow as it has a good IR filter. if you want a Galileo, check my listing in Buy, Sell & Trade.