Sorry you've had a sense of humour bypass operation John, I wasn't really being sarcastic actually.
I was trying to help with my first reply, in my second reply I explained that I don't know what an IMP slope is, I still don't because you couldn't be bothered to explain.
The picture of the Imp may not have helped much but it's the only sort of Imp I know about.
At least I'll know not to bother next time.
Just realised it didn't say Imp it was supposed to be LMP.!! Whatever.