Ok, so today I just received the drive and took a brief look at it. It's not even nearly close to the i-Mac design - that i-Mac drive it's way better designed and simply to mod...
Mine is just horse s**t... doesn't even look in same condition as in the pictures... I mean it's the same drive all right, but in the pictures it looks almost brand new... In reality it looks worse...
It's not even centered well and I think it misses one or two custom springs... Well... what could one expect from a $3 SH drive...
I didn't had much time today but maybe tomorrow or the day after I will take a look more carefully to see what can be done...
And not to forget that the drive looks smaller and slimmer in pictures :/ It's not. It's a little more bulkier and thick...
If I had your i-Mac drive I would definitely go with the mod. Seems like you're having the slim PS One though... Maybe you have a PS1 too ?
If you do, go with the mod
it's worth it.
Forgot to mention that my drive has 4 mechanical switches instead of your i-Mac's 2 optocouplers.