i just got my Kit and started the procedure, i decided to try if i can get the bulged batteries out with a fishing line, which worked fine. No need to use any solvent and even not too much force was needed to get the line under the batteries. I was able to remove the batteries in about 5min, used another 10min to clean the case from the residue, and put in the new battery. All togehter about 20min of work. I´m very happy with the result, Macbook stays now back on its feet, closes correctly and trackpad works as expected.