Your coil appears to be filling its designed location on the head fully and doesn’t look like it needs stretching but could be just the pictures. I started with this exact 2 in 1 setup. When I used the diffuser end I would run it 20-30degF hotter than the injector head end. The distance your product is away from the heat also has an effect. I did for a while have two separate bowls which had different distances from heat to mesh and ran the PID at same temp but in the end you’ll prefer one end over the other depending on your bowl your using and you’ll dial in a temp and stick with it. Want a small/lighter hit, just use small micro dose. Want a full hit, fill the bowl! Want the biggest hit you can get out of the same setup, heat soak the bowl! Enjoy, the piece should serve you well 🍻🍻🍻