Agree with all the above. Just to add, the 47/7's had a more accurate speedo too, clearer and more finely calibrated up to 100 mph. Also, inside the cabs, above the windows all 47 loco's had a reminder Max speed 95 mph, except the converted loco's, Max speed 100 mph. They also had a slightly different layout within the engine room for CO2 bottles, something to do with them being operated in push mode, canot recall. Early conversions took place at Crewe with testing down the Shrewbury branch on a standard class 2 service, usually with a class 33 tucked inside. The loco came off at Shrewsbury and returned light engine to Crewe. It then worked light engine to Edge Hill in the early hours, was checked and refuelled. Then worked the first empty stock down to Lime Street the following morning, usually for the 07.05 and the loco eventually worked its way back to Scotland on the first Newcastle service. I recall 47 704 fresh off Crewe in the large logo livery, she was immaculate and I had the pleasure of driving her (albeit only from the shed, to the carriage sidings and down to Lime St station!!!). I wouldn't dwell too much on the 95 mph restriction on standard 47's, most drivers would do + if and when they could on class 1 duties.