I can confirm precomp 0.4 -slow -t-j takes VERY long to run on this file. It's been running for ~15 hours now and it's at 97,4%. This is done on a machine with 4gb of RAM running a Q9650 @ 4050mhz on a fast Solid State Disk. At the moment the Solid State Disk is bottlenecking the process, showing a constant ~150mb/s usage with reads and writes. Once it's done I'll see how small I can get the file.