To be clear: neither SImage nor FirmTek did develop a single bit of the code for 3132 / 3124 (they are similar!) in last probably 12 years.
I can testify that what I did 12 years ago was some fix for the ExpressCard only.
The base code was unmodified probably since 2006 - 2007. And that is only the FCode (from me) and the driver ("X" only, either from me or from SImage, no other choice exists).
In these 13 years much changed, the existing code is barely sufficient today. Both my code and the code from SImage panics.
I panic on hot-swap, SImage (their code from Monday, Sept. 10 2012) panics on simple I/O test.
The best performance both code can achieve in MDD G4 with a modern SSD is about 130 MB/Sec on write (me), 100 MB/Sec on write (SImage), 200 MB/Sec on read (me), 220 MB/Sec on read (SImage).
This is what we can expect on "9".
The root cause for the slowness is the design of the card (3124). Fixing, updating and the unlocking the existing "X" driver is a must before doing anything else. Luckily it is not that difficult, the tools today are far better than what they used to be.
And from today's perspective these 13 year old pieces of software we wrote are quite outdated. Looking at them gives few thoughts how a "9" part of it has to be done.