MST Alum. 8-adjusting servo saver (black)

Waste of money.
Servo saver failed within two minutes of use.
Having the two choices of spline count retains a star.
The fact that the spline adapters are made of plastic, is the very reason they failed.
As an interictal part of the saver design, this adapter should be metal.
There is a small tab on the adapter that takes ALL the force.
This tab sheered clean off, leaving no steering.
Pictures included shows the failure. (Unable to DL pics, too bad)
Do not purchase this item until R&D can figure out how to rectify the issue.

Would be a great servo saver but the insert for the servo output is also part of the mechanism and it is made of a soft plastic. There is a tab that will just snap off when you use the black ring or silver black. Would probably be okay for the plain silver ring.

Normally I would 2 or 3 star and get a replacement part but MST is based out of China and there is absolutely zero support listed in their website. I reached out to both my local Hobbytown where I purchased it as well as the message support on the Hobbytown website. Neither could help me get the information for MST support or a replacement part and the message support was not helpful at all in any way. I was told in kind words I was S.O.L.

Save your money and get something else.