Actually Revin, I don't have any problem keeping an eye on enemy fighters and calibrating the bombsight.
I'll explain:
First, I climb to my cruising altitude and turn towards enemy territory far enough away to have time to accelerate. In Ki-67s this means 330 TAS [true airspeed].
My IP [initial point; the last turn towards the target] is at least 20-25 miles from the target. This is historically accurate.
I go to the bombardier position and set the target alt and get an early setting for the drop. Then back to external view.
As I get closer to the target and I'm sure my speed has stabilized I set the bombsight again (only for speed now), then go back to external view.
Any enemy trying to intercept me will be visible a long way off, well before they are a threat.
As I approach the target I make the last course corrections. Back to external, while I let the speed get constant after the course correction.
If there are any enemy fighters nearby, this is the only time they are a problem, but then only if they are in position to attack. I've had many missions in which I've watched an enemy stalk me as I go on my bomb run. But at d2.0 at my high 7 I'll have time to man the guns, because....
....I can calibrate the bombsight quite accurately in less than 10 seconds, jump to the appropriate gun position to check on the interceptor and go to the bombsight for the few seconds required to make the drop.
The most dangerous pilots will wait at your high 10 or 2 and try to time their attack when you have to drop, but that's hard to judge, and very few pilots are capable of making such a professional intercept.
And remember, I don't have to make the last calibration. It just helps if I've had to make last minute course corrections, beyond just very slight, gentle ones.
Bombs away and it's safe to man the guns.
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If you don't believe this works, just check out my buff score and stats on the HTC website.
MRPLUTO