put it on today as TC said, without the extra back support bracket, easy as piss and so far feels better than roadster gel crap. much softer than the corbin so for the 5 minutes today son loved it as is very wide in pillion section and he felt more secure, i liked it as is nice and low and comfy. Heading off on long ride next weekend so will let you know how i go.
by the way, bought mine for about $150 today from Triumph Melbourne as apparently it is a discontinued colour or something. The replacement is about $840. If the fella from the dealership got this right then I have a bit of a bargain!