The green centering rings got a shallow notch for the engine hook.
The blue engine block got a "Bradycros" notch for the engine hook.
When this notched block is glued in place it won't wobble over the top of the hook bend.
Kevlar was added instead of the tri-fold mount.
There isn't much room in between the 20 sized mount tube and outside BT-50.
Instead of tying a knot, the Kevlar was turned under itself three times and tightened down.
When is was pressed into the centering ring glue fillet the Kevlar hold is strong!
Normally I'd replace the blue engine mount tube with something stronger.
These blue tubes were pretty strong! They seemed a bit smoother and shinier.
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