New carb for the XT600

[xtmotoman]

Hello folks!

I have a XT600 43F (1986) and because the original Teikei carburetor is heavily worn out and it makes no financial sense to rebuild it, I'm thinking about fitting an another carburetor.
Good used original one is rare and very very expensive.

So I searched through various pages and in the end, I'm consdering these two carbs:

Keihin CVK30 from Ninja 250 (maybe the same as ZZR or GPX?)
Mikuni BSR32 from Suzuki XF650 Freewind

In this forum I saw few comments that people made the carb conversion.
Is there anybody who has experiece with using either of these?
Could anyone share some info - what were the biggest issues? Was re-jetting necessary?
Which of these might be better option? I'm little bit worried about the size of Freewind's carb if they fit into the frame of a 43F...

I can buy a card from Freewind easily for aroud 100€.
Those from Ninja 250 are harder to get here in Europe (maybe it's the same on GPX or ZZR or even KLE250?), but also somehow possible to get them.

Thanks for any answers, hints and experience in advance!

BR, Martin