I had a Aquila installed after having one on my 30 Gibbs for 20 years. But the STW is a totally different beast.
Lots more powder burning = more boom. It worked well but there was alot of felt air blast from the break, especially in my right ear....
These last few weeks I have been considering a OPS INC break. A friend put one on his 300 Ultra and it works really well (or so he says). I am going to try it next week over east and see how it really works. Before I spend another $100 on a break. Here is there site iffin you want to see one. Seeing how I already have my bbl threaded I might as well try another....?