I'll try and get that sorted for ya so it's online tomorrow. It's literally a case of just copy and pasting the stats from Mercedies into the other cars files. I can get that done tonight but of course, wouldn't have tested it (not that it needs much testing, all cars would just behave the same as a Merc).
The RnD bars will increase for every upgrade still, but their starting positions are identical to vanilla. The game won't realise that suddenly all 11 teams have the same stats, so will continue to think Manor are awful and Mercedies is above everyone.
However, in actuality, if you are a Manor, and you put on an engine upgrade first, then while your bar which was low has increased slightly, the development bars will still show you as last, when in fact you have the very best car.
This is just the limitation of what we can currently change.
In addition - the Manor's team Expectations would still be 18th-ish - as your team also don't realise you have the best car in the field.... Which is probably the biggest limitation this modification.