Need one of these!
I have two - one measures 845 mm approx and is a tad too short - the other 1050mm and is a bit too long to loose the 'slack'
So, about 950mm overall would be a rough guess - its a TS250 fitted with ETZ bars which probably explains the discrepancy.
Willing to swap if anyone needs one of mine or let me know what you have etc.
Andy