looks like a good start, but the hard drives will not last long even with a sealant on them. They will work, but will slowly die. the DVD-ROM drive cannot be submerged because the laser cannot reflect light correctly or spin the disk to the required speed to read (duh). This is a good solution for an old PC, or original xbox, but I would not recommend doing it to an xbox 360 or high end PC because the oil does get hot. Unless you have a pump cycling the oil around, the oil around the components will heat up VERY quickly and will slowly move around and cause everything to get hot.