Mamboe,
Love the heisenberg logo.
Regarding LSAT RC, I would be very careful about using LSAT RC passages for practice. There is a range in number of words in a passage for GMAT and they range from short to medium. For LSAT RC on the other hand, the range is from short to very long. Further, the very long passages tend to have many connected long sentences which are not typical of passages on the GMAT. The GMAT reading passages are more along the lines of organized sentence structures. Some passages may be a good overlap but there are plenty that don't.
Here at GMAT Pill, we've optimized a reading strategy that is specific for the GMAT type passages -- following the same pattern gets you strong confidence in answers for main idea and detailed questions. If you optimize a strategy around LSAT RC, you might find that it's not directly applicable to GMAT RC. Some main elements are, but there may be plenty that is not relevant. On average, GMAT questions have more to do with main ideas and details supporting certain statements...LSAT RC will dive further away from main idea questions -- which gets you into detail territory.
If you want some good sample RC passages and how we at GMAT Pill go about approaching reading the passage in about a minute, check out these sample
RC videos.