I have used the one from GWM and the New TGA one.
After speaking with Jetcat they suggested the one from TGA. They told me that the original was developed and tested by Jetcat for a drone that they were building for SAAB, (If I remember right.) It is the correct distance away from the fuse, etc, but can be shortened by sanding the base for other applications where a perfect air flow would be available closer to the attachment point. The TGA quality was much better and it was lighter also.
Paul