Honestly Maurizio, your tips are better. If I were you, I wouldn't spend any time on a Yo-yo Jam mod. I started performing with the Top Dogs because they spun longer and were more durable than anything else available, but now I can say the same thing about Strommol 8 tops. After I had been using the Top Dogs for years I was very fortunate to make it onto the Duncan Team, and then years later Duncan came out with their Bearing King tops. Originally I couldn't get them to spin, but then once I figured them out, I couldn't get them to spin as long as I needed. Now I have your tips, plus Eric "The Modmaster" Wolff and VOILA... a Duncan top that spins forever! I will be seeing Eric in a couple of weeks, and then I will have enough modded BKs to last me for a while.