I am going to be shooting this lens until sigma or another bring a native 14mm 1.8 (or their 1.4) to z mount. I use trackers and also do stacks but I have always loved a fast uwa prime. Can the mount handle this on a z8? Thinking of the increase in moment (m=fxd) applied to the lens mount now the ftz ii pushes it further out. The z mount looks well designed and the mount well fixed internally and with its 4 locking positions on the mount it is reassuring. What are your thoughts?