okay to answer you on your troubles as best as i can.
one.
the cdrom's leasor light might be in need of a clean lens.
buy a cdrom lesor dusting cdrom disk from a store they are
a cd disk with several little brushes on them that wipe the dust
off the lens this will also give you better reading from the disks.
it might not slow down the ripping unless it is covered with a layer
of sticky humid grimy dust. but the lens should be dusted every now
and then anyway.
the heavy use of the cdrom drive might have wore out the motor or the drive belt which ever is used by the cd drive.
the cdrom manufactures have also the options of putting software in your
computer to slow down your ripping so you get tired of it and don't do it anymore.
we know sony was sued over adding software with out telling anyone, but how many others are out there doing it that we Don't know about?
they might not have done it but that is a possible reason so it needs to be checked in your system and see if they did it.
now also the item you said of your cdroms slowing down or speeding up every time you put in different ones..
the reason has been known for about ten years now. and about 4 years ago the mythbusters did a segment on their show about the reason, and found it to be Real and not a myth.
the trouble is the cdrom drives can spin the cdroms too fast. and they will wobble and too much then crack then shatter.
the chemicals and the plastic can only handle so much spin speed, and the companys make the disks spin at the speed they wish to, which is the speed they feel will get the most life out of the cdrom disk.
and they also use different chemicals on them in order to burn them at different speeds.
some chemicals are too thick to be used at high speed.
what happens is the wobble of the cdrom disk will make the chemical form a wave on the disk yes a small wave on it because they get liquidized by the heat from the lesor and the spinning.
what that does is make the disk lopsided when it spins and thus makes it more prone to crack and shatter at high speeds so the cdrom disk manufactures and the cdrom drive manufactures have got together and added software in to the cdrom drives that will read a coded number on the inner hub of the disk and adjust the spin speed of the drive for that disk.
you can read that number if you look closely at your cdrom disks it is very small. and close to the chemical layer of the disk.
but that is the reason they speed up or slow down.

okay to answer you on your troubles as best as i can.
one.
the cdrom's leasor light might be in need of a clean lens.
buy a cdrom lesor dusting cdrom disk from a store they are
a cd disk with several little brushes on them that wipe the dust
off the lens this will also give you better reading from the disks.
it might not slow down the ripping unless it is covered with a layer
of sticky humid grimy dust. but the lens should be dusted every now
and then anyway.
the heavy use of the cdrom drive might have wore out the motor or the drive belt which ever is used by the cd drive.
the cdrom manufactures have also the options of putting software in your
computer to slow down your ripping so you get tired of it and don't do it anymore.
we know sony was sued over adding software with out telling anyone, but how many others are out there doing it that we Don't know about?
they might not have done it but that is a possible reason so it needs to be checked in your system and see if they did it.
now also the item you said of your cdroms slowing down or speeding up every time you put in different ones..
the reason has been known for about ten years now. and about 4 years ago the mythbusters did a segment on their show about the reason, and found it to be Real and not a myth.
the trouble is the cdrom drives can spin the cdroms too fast. and they will wobble and too much then crack then shatter.
the chemicals and the plastic can only handle so much spin speed, and the companys make the disks spin at the speed they wish to, which is the speed they feel will get the most life out of the cdrom disk.
and they also use different chemicals on them in order to burn them at different speeds.
some chemicals are too thick to be used at high speed.
what happens is the wobble of the cdrom disk will make the chemical form a wave on the disk yes a small wave on it because they get liquidized by the heat from the lesor and the spinning.
what that does is make the disk lopsided when it spins and thus makes it more prone to crack and shatter at high speeds so the cdrom disk manufactures and the cdrom drive manufactures have got together and added software in to the cdrom drives that will read a coded number on the inner hub of the disk and adjust the spin speed of the drive for that disk.
you can read that number if you look closely at your cdrom disks it is very small. and close to the chemical layer of the disk.
but that is the reason they speed up or slow down.
8)