First drill a 2,5 mm hole in the center, then use 28 mm long 4-40
screws (measured with the head).
Screw then in until there is 36,5mm from top of the screw down to
the chassis, as seen in the above picture.
Use AE thumbscrews. Tread these on BEFORE cutting off the head of
the screw with a Dremel with a cutting disc (wear goggles!).
When you
crew them back off you ensure that the threads are smooth on the end.
You can add 14,5 mm of fuel tubing for looks.
Finally
countersink the holes in the brace a little, so that the thumbscrews
fit snuggly.
Use AE thumbscrews. Tread these on BEFORE cutting off the head of
the screw with a Dremel with a cutting disc (wear goggles!).