RE: 3D prop for .25FX
Here is a photo of my PBF. The setup calls for a MAC'S header that goes into the Mouse can held on by friction over the silicone tube. A "Stinger" exits the Mouse can and is held on by JB Weld. Do a search on how to make one. I purchased this one a couple of yeard ago at Hodges Hobbies for 28$ a deal since the header alone goes for 20$. Mac was getting them from a supplier in Florida cant fine the info.
Will post Tach # later in the week.
Pete