Excellent and Thank you Chi - I appreciate your efforts.
I really do think my pad is based on a SL type - the four mounting points look VERY similar to the ones on my 916 style unit.
Had a nice garage session today and refitted the old seat and panels, the new unit simply sits on the rear frame rails and relies on the lower mounting point and the riders weight to hold things together!
I fitted some pipe insulation to try and help matters and it seemed ok but fitting the OEM seat unit shows just how well Ducati parts are designed and made.
Amazing difference - had a measure as well, new unit = 30" seat height.
Original unit = 31.5" and as any lady will tell you an inch and a half can make a world of difference.
I've took a photo that tried to compare them but I dont think it works too well.
Thanks again - Frank