Thats nice, but strangely I still find the pre-production one better, even with its incorrect yellow lettering.
Regarding 30062/DS234, this loco had the extended 'IOW style' bunker, so using one of the BR black versions would need more than a re-number to be accurate.
...and the Yugoslav copies have plate frames instead of bar frames and the most notable difference, cranked steam pipes. It is suggested that the boiler is pitched higher too but I'm not so sure on that. Having looked again at pictures yes, the boiler is pitched higher.