Talk:Bridge/@comment-68.46.24.10-20130518231727/@comment-3991817-20130519111429

The drop rate is shown on their respective pages. You must have had some bad luck as one would expect 3 or 4 boards from the demolitions you described.

What I did to get the boards was to build the maximum amount of ECH's, wait for them to complete and than demolish them all. I chose ECH's because there are not that expensive and they have a short construction time, but any of the three will do. If you have enough money you can even do the fast-forwarding twice when constructing and also when demolishing. This way you will have all the boards within half an hour.