Answer to both questions ie battery location and flap angles.

The 320 fuselage flap fairing is located at -7 degrees thus when the flap
travels down 42 degrees you are at 35 degrees down flap.  POH states you
drop the flaps down about 1 inch ie 7 degrees below 140 ktis and drop gear
at 120 ktis.  This creates noticable drag and lowers the nose slightly.  As
a matter of practice it is very unusual that I land with full down flaps.  I
prefer to keep that extra margin of lift ready at hand.  Full flaps are used
if I make the high and steep approach to runways.

Battery location.  I have a complete IFR panel and use a 27 ampere hour gel
cell  battery installed in a handbuilt aluminum battery box with about 1/4
inch clearance around it. The battery box is cooled with blast air from the
right rear of the air plenum. It is neatly supported with adel clamps
wrapped around the right side braces of the motor mount very close to the
motor mounts and firewall mounts to avoid adverse bending.  Clearance to the
cowling is very close but doable. Remember that gel cell batteries do not
need to be vertically oriented.  This battery is slightly tilted as needed
for clearance and obstacle avoidance. Of course this gives you the shortest
battery cables, reducing weight, gives maximum CG forward balance and the
battery is still quite servicable after three years and  200 tach hours.


Oh yes, I have the short dynafocal mounts so if you have the long mounts
this solution should be no sweat.

Bob Smiley
N94RJ