I have had great success with the 9.5 head as a matter of fact it keeps pace or better with the M5. It’s a low flying missile and I normally play a bit more loft so I grabbed a 10.5 when an online forum member immediately sold his 10.5 head as he struggled with it.
I shafted it with a shaft that worked in the 9.5 head but really struggle to get the 10.5 to work. It has to be hit perfect to go and even then its blah.. Conversely the 9.5 plays well on less that perfect contact. A full bucket of balls and I couldnt get comfortable with it and I can hit just about anything.
I know you switched foundaries and are reworking dies. Had you seen variances in tested club heads. I’m baffled by the difference in performance. I have also seen some of the mixed reviews that have been posted.
First, we did not change factories on the ISO-T and have not “re-worked” dies on the ISO-T. It was developed and has been manufactured by the same factory that is doing the majority of our product now. High end, high quality. Secondly, I personally have not experienced what you have experienced. Our testing produced great performance from the 9.5 and the 10.5, as well as the 11.5. If it had not, we would not have released the model. There can always be individual heads that may have an issue. It can happen and happens to every manufacturer. If you want to return the 10.5 to my attention here at The Golfworks, I would be happy to evaluate. The last thing I want is for anyone to have a product that is not performing for them due to something not up to par on the head.