As I said in post #3, you have to shave with the Telstar heads using a steep angle. Otherwise there will be cuts. It took me a couple of shaves before I remembered that @Ron R mentioned in another thread he got excellent results when he changed to steep angle with this razor.I watched on Youtube a video of a gentleman who was shaving comparing the Yaqi Mercury heads with the Testlar.
Using the Mercury head to shave he had no problems, with the Teslar he was full of cuts and blood all over his face that I feared the worst for him.
He commented writing that he did not like the Teslar because he had not encountered these injuries in in his previous shaves.
Can you recommend which handle in combination with the Testlar to handle it well?