I figured all those early adapter Mac II buyers had a good reason to upgrade to a IIfx motherboard (superdrives being a good reason since software was no longer coming out in DD disks). IIx's were not sold that long compared to the original II.

Both of my IIfx were original IIfx cases. One of them was kind of yellowed so I purchased a IIfx case which was actually a II upgraded to IIfx (liked the novelty of it). Still have the yellowed case in the garage.

Replacing caps on the II series is easy, much easier then a Classic II compact that for sure.