I received the E-sky aluminum central holder today and put it on my Lama. This is definitely a better part with improved precision and strength. My lama also had another visual improvement that can be seen in the fourth picture
I also took a photo of my brother's heli mounted with a training gear:
It's a BMI Bell 47.
We also shot some videos of it flying:
Video 1 (8 Mb)
Video 2 (11 Mb)
We discussed how to upgrade it and he has prepaired a new fuselage for it.