I rebuilt my Diatone GT-R90...long story but basically I had the frame, camera and XM left over from a project. I wanted to build this and give it to a friend. This build was TIGHT! I had to take out the screws and spacers a few times because the VTX was hitting on the back of the frame. I dont think this stack was a good choice for this build. I should have got something that didnt have a solid connection between the ESC and FC board because it was hard to shock mount it. I ended up mounting the 4 main screws through rubber shock mounts. So the entire stack is shock mounted. Probably not as good as just mounting the FC. I like the HGLRC VTX 2 a lot. It's light, mounts easily, and the smart audio works great. I picked up the motors on sale. I had to reduce my P and D fairly low to keep the motors cool.