Where is everyone buying their slow jets ??? And what size ???
go directly to Sudco....never a problem and cheaper than HDL.
Not convinced the .38 are any better than the .35. The difference is 30 microns. If you've got particles plugging 350 micron (.35mm) slow jets then you've got other problems.
Now, if you're trying to add fuel for the slow jet range, I say go for the larger size. Otherwise stay with stock.
I'm sure there are a lot of opinions out there, this is mine.