Apparently, when they turned it round to go backwards, curves had to be adjusted to reduce the lateral G-forces and the new trains had to carry two more passengers while retaining the same weight. So this needed some serious engineering and so turning it around again shouldn't be that complicated. The wheel chassis would stay in the same direction and only the seats would be mounted the other way around.
Some reports say that they factored in an eventual turn back forwards when they changed it originally, so it could be changed back without too much effort at any time.
I'm only reporting what I've read but there is a board up outside the ride at the moment stating that it will re-open on Sat going forwards again and they've already taken away the "a l'envers" signs. Still wondering if I can be brave enough or chicken out like I usually do!! Any advice anyone please?