When landing the B-1, no matter how softly I land the back wheels always collapse.

Is anyone else having this problem?
Can anyone tell me how to fix it?

How much fuel are you landing with?

I tried a take-off with full fuel load and the wings swept fully forward (obviously the wrong configuration) and 200 yards down the runway, the aircraft was doing an impression of a space shuttle (nose vertical before I'd reached 70 knots).

This leads me to believe that the fuel load is heavily emphasised at the rear in the model, meaning a lot of the weight will be on the rear undercarriage at heavy fuel loads.

Whether this is true of the real B1 I couldn't say. Made for an interesting spectacle at the time though.