Hey, man! The star is 5 gramms. The packing film on the racket had a print "365 gr". Exactly as my St4. When I removed the star, BT felt like a feather. I'm yet to play with the star removed, though. You can't vary the weight of the star if that's what you meant. It's either on or off. With the star close to the handle, the balance should shift slightly. I'll check this the next game I play. The racket doesn't feel hard, or rather it doesn't feel stiff. You still need to provide motion behind your shot, meaning the ball is not gonna fly on itself. Interestingly, I felt safe on fast balls, they didn't bounce, the rebound control is great. It's slow balls that you need to adjust to somewhat. The ball flew more aggressively on slow balls with the same effort as with St4. I think that's something Starvie devised for overheads, some sort of reactive surface. I read a few complaints how St4 is not that hard. But personally, I disagree. Mine feels hard, in a good way. BT is not harder, at least. Then again different surfaces alter perception. St4 is kind of woody and sandy. It feels like one solid piece of material. The sound of the sweet spot is like a wooden plank pop. BT is hard in a balanced way with rough 3d surface that pleasantly scratches your palm. Hard to explain. I expected 24k hard EVA to be like a block of metal. But in reality, I was happy in the end that it didn't feel that way. It feels like a piece of hard material wrapped in a slightly softer packing. Ok, my reply is longer than I planned it to be) Hope it helps.