Thanks again for the replies guys, glad it has caused a bit of a stir
I have put a shorter stem with a longer stack on now which unfortunately is silver at the moment, but has made it alot more comfortable for me.
Its a baby 60mm but I think I need an 80mm.
I am a bit of an odd size with a 34leg but only 5'10" tall, hence needing a 56-57 frame. But I have got a shortish torso/arm I think
But I did the 18 miles home Thursday and Friday evening to which were both very enjoyable rides compared to the slightly uncomfortable ride in on Monday on the original 100mm stem.
The longer stack on the shorter stem has sat the bars approx 2" below the saddle as opposed to around 3 1/2 - 4" as shown in the photo above, so alot lesser extreme position.
We will see how I am over the coming weeks...
Anyone got an 80mm long stack stem knocking about???