The point with the modified card is that it will still work with SIOC, otherwise I would have made my own servo card that also included a serial number so that it didn't rely on the way Windows names the cards. With opencockpits solutions you have to change in the config-files if you for example move a card to another USB-port or if Windows for some other reason decides to change the identification string, because the cards doesn't have any other way to identify themselves. Extremely annoying when you notice that the instruments are not working anymore and after 30 min of testing the usual SIOC-maintenance things (reload code, restart SIOC, restart computer etc.) find out that Windows decided to change the name of the card so that you have to change all the references in the SIOC code. But in the absence of other I/O-solutions with scripting capability, it's nice if the card works with SIOC.
Edit:
The exact timings of the stock cards are from 0,25 ms to 2,5 ms. A Futaba S3003 uses 0,4 ms to 2,5 ms. The result is that the servos doesn't move when you write lower values than 100 to the servo cards. With a total span of 0 - 1023, the mod should yield almost 11% of resolution improvement.
Edit:
I have started blogging about my development now. I don't feel that this belongs in your thread, so check out brydling.blogdns.com instead and message me if you are interested. I will make a clone of the stepper card too, since these cards REALLY suck.