I don't get it, you wrote:
[...] if i patch it with loadv43 it says "not patched" .)
and now you're writing loadv43 works.
The .strip should be in SYS:DEVS, not in C:
I meant the .strip file version, and it's definitely not on the Aminet.
I never used NSD patch, maybe the scsiv43 patch and NSD patch can't work together?
Try the scsiv43 patch without the NSD patch first.
About OS 3.5: it is simple system. It includes some important solutions without need of third party patches like in the case of OS 3.1, so the system itself is more stable.
AFAIK it is not slower than OS 3.1, it just needs 68020 because some applications and libraries were optimized for this CPU.
I have one copy for sale (CD + jewel case + short introduction), and shipping to the Czech Republic is definitely not so expensive, even as regsitered letter.