3 flex shafts w/props gone...

[Manns50]

I use full size 10mm and 9mm wrenches on collets about that size, and tighten them good and tight with reasonable pressure for the threads in question. It's the little stubby freebie wrenches that get you into trouble, they don't provide enough leverage and will usually end up rounding corners.

Ok thank you for the reply, I guess I'll just have to tighten them up to where I think it needs to be if I lose a shaft it's a learning experience, I ordered a shaft saver with this order I just placed for the .187 shaft and coupler. I know some don't run those savers but I figured it couldn't hurt much. Hate to lose my dasboata prop lol.