Sorry to pour cold water here.
The chances of the share price of the 3 crane companies to return to their golden era in 2007 is very very slim.
Reasons ?
1. Construction companies were forced to pay sky high rentals (amounting to ransom) to the 3 crane companies during 2007 when the demand for crane was so terribly tight.
( I remember whenever I drove pass the Marina Bay Construction site, I saw hundreds and hundreds of cranes in operation.
Double that amount for the RWS construction sites that run concurrently then. )
I believe the construction companies have learned their valuable lessons and will definitely has some backup cranes of their own in case situation gets tight again.
2. Crane companies in 2007, blinded by the windfall profits, get greedy, and thus order a lot more cranes than needed, hoping to earn even more profits.
When demand suddenly disappeared in 2009, they are caught with the pants down.
Just my humble layman opinion.