Hello Ian,
I'll do a proper write up shortly and include it on the product page.
Here's the current short version:
Fitting your existing pipework is very simple - remove the split pin and roll pin holding the pipe to the back of your original item, then pop the pipe into the new part and secure with the roll pin and split pin.
This is very simple, needs no special tools, and should take no more than 15 minutes.The pipework can be swapped in situ - no need to remove anything other than the Master Cylinder itself.
You will need to bleed the system once fitted - we recommend flushing the entire system out with at least 250ml of fluid to remove all traces of rubber particles and old fluid from the pipework and Slave Cylinder. You can add 250ml of Genuine TRW fluid (DOT 4, compatible with originally specified DOT 3).
I've just heard that these have been delivered - I'm still away, but I'll be sending them all out on Friday.
Going to be a busy day - you guys and girls have ordered 53 between you all! Thank you.