Cartridge mount screws - stainless steel

Hi ; If you want to go over the edge Elusivedisc dot com has carbon fiber screws they look great until I saw the price check em out

$199 for two screws- I'm definetely going to pass.
This is one of the most rediculously priced items I've encountered lately.

For $199 i will have to try making some carbon fiber bolts. I have machined carbon fiber rods down to size so i will have to try threading it now.

So, what's the right size? 2.5 mm? Elusivedisc carbon fiber Shelter screws are 2 mm.

Just an update- Mapleshade sells brass mounting screws in 2.5x16 mm size with nuts.
I ordered two pairs, should be "under $5 per pair", I've been told.
They also recommend Nanomount system, which you can see on the Mapleshade website, which should "drastically improve cartridge performance".
Anyone tried Nanomount system yet?