Yokiamy
(Yokiamy)
39
If the hot spot of the FT03 is more well defined than your C8, you might disassemble the C8, and sand down the bottom part of the plastic centering gasket.
You will be amazed how much difference a few tenth of a mm makes.
(please be gentle with it, they break easily, but you can buy spares)
EDIT, did i just talk you into the modding scene ? 