Thank you all for the advice
I've weighed it up and had a word with Peter Mulberry (helpful as ever). T5 it is, but I want to get the semi-helical close ratio version. I have also looked at G-Force and I'm a little confused as to differences between G-Force 5 speeder and gearboxman T5 semi-helical. I've made enquiries and now wait patiently for replies from suppliers
Terry