Hi Dick and Patricio

here is the system I did for Jon Martin in the build manual
it`s a copy of the Nishioka quick release system from wood and a steel wire

Cowling with Quick disconnect,, from the yet to be published manual LOL,


You can use your own method of installing the cowling for the glow
version. The rear pins are already installed at the factory, with a
front screw in place. However, the front screw will interfere with
the glow engine, so it will have to be removed and another hold down
method used.
In this example, I will show you how to make a wood version of the
Japanese cowling quick disconnect. The front screw is installed for
the electric version but, again, this will interfere with the engine
on a YS. So, it will have to be removed and the flashing ground away.

Using the supplied instructional photo’s, build a couple of pin
latches for the disconnect system. Use a spring steel wire and bend
it to the necessary shape. Relieve the fuse sides near the firewall
to allow the latches to be installed square to the firewall, and
then screw the setup to the firewall. Using 5mm aircraft ply, cut
out some triangle stand offs for the pins holders. Using 2.5mm or
6-32 screws, file the heads round so they can move the spring wire
as it is inserted in the latch. Remember to drill the holes in the
latch equal to the size of the insert screws.
Cut spacers to insert under the standoffs, keeping them vertical to
the cowling on the fuse, and test fit the standoffs to make sure
they touch the cowling sides (you may have to adjust the wood
cowling alignment inserts installed at the factory in the middle of
the cowling, for enough slack to be easily installed) After test
fitting, use a thixotropic epoxy glue mix and glue the standoffs to
the cowling. You will have to cut out cooling exit holes in the rear
of the cowling, see the supplied photos.