BMW e30 B600 request

Has anyone managed to make a good B600 lobby tune for the BMW e30 M3 that they would be willing to share?

I have been trying with the the S54 straight six swap but I am struggling to get rid of mid corner understeer.

I am pretty sure I can knock up a lobby tune.
Do you like speed or handling tunes.?
I like to tune with a track in mind, so name a track and I will tune to that track and post my times.

Wow Thanks BIGLETCH, that would be great!

I prefer grip tunes, but usually try for just front adjustable downforce so not to slow it down too much.

I had been using Brands Hatch GP as a test track.

Do you have a base-tune calculator that you could recommend? I have tried http://www.dltuning.co.uk/ and http://bg55.com/u2scforzatuner-fm7.php