Skorpion & Extreme lovers, you better have "Plan B" for your vee-tails
The vee-tail of Skorpion & Extreme were based on the "self-destruction" concept
That is, if under hard landings or crash, the vee-tail joiner will break by itself to miminize damage on fuse & vee-tail 
I verified this "self-destruction" 2 times - one pcs in MOS and two pcs in Peng Hu
However, finding a replacement of the vee-tail joiner is extremely difficult because the diameter is 7 mm - no any standard dimension you can find
It was also tested not possible to use 8 mm hollow carbon rod to modify 
After exhaustive search, I found a nice substitution - hollow carbon rod with 7mm outer & 6mm inner - perfectly fitting to Skorpion (and very likely good fit to Extreme as well). With this hollow carbon rod, it is possible to fill the inside at different options
a. Use "ugly" wood inside such as the original design
b. Use "epoxy / micro-ballon" - the first generation Skorpion
c. Use standard 6mm hollow carbon rod - my choice
Where to find such 7mm outer & 6mm inner hollow carbon rod
Still some limited stock in Dong Fong Street - it was originally made for heli shaft but already stopped in productoin
Feel free to stock some if you want stay long with your Skorpion / Extreme
You may bring the fuse for test fit there as well
信者得救 
