After pulling the Hacker motor and all the components out of
my Phoenix Extra 330 .61-.91
i had to patch all the air holes and the hole i made so the electric
motor would fit.
Even though it cost me 1/2 oz in glass and epoxy; I'm Real glad i did !!
There are two tabs on the very front of the firewall that secure the side
of the fuce to the fire-wall and also double as a attachment point for the
cowl.Can see good in link below:
http://www3.towerhobbies.com/cgi-bin...?&I=LXNCT4&P=Z

I cut them off so as to wrap glass and epoxy to strengthen the fire-wall.
There was hardly any glue in the hidden joint,and i'm betting that the
DLE-20 would have pulled the mount right off the front of the plane !!!
2 hr of work and glass later-It's not going anywhere now. But if you
have this airplane,be SURE to check this before mounting a DLE-20 to it !!
Bille