The Mosquito is a great little yoyo. It’s problem is, it’s too light. It’s uncool to link to other forums, so google “Mosquito mod dirty birdy”. If you don’t have any tools, don’t worry about the silicon recess part. The important part is the tubes. if you read down a little, he talks about putting 7 or 8 bb’s in each tube. This adds about 15 grams to the yoyo, which basically makes it a Flying Squirrel. Here’s a tip; He gets his tubing from Home Depot in 20 foot lengths. Go to Wal Mart and get 4 feet of “aquarium tubing” for about $1.50. This “mod” only costs a couple of bucks, and if you don’t like it, you haven’t hurt the yoyo - you can take them right back out. I’ve got 7 of them set up like this, and they play great.