yeah, the accelerator pump could be disconnected, that actually probably wouldn't be too hard.....
i really dont know if an FCR would work on a 2 stroke, but I know with 4 strokes, the FCR is king of the hill. There are flatslides similar to the PWK (hell, maybe varieties of the PWK will work on a 4 stroke too), but the FCR performs a lot better.
The PWK just looks like a dated design to me (and thats only my opinion and i could be way off). The FCR has a slide that is supported on rollers for very low friction, for example - but of course, thats so that the slide isn't really hard to open due to engine vacuum, but.... maybe thats just not as big of a deal with a 2stroke.....