This mod applies to any bpv of recirculating design that has a lower boost reference hole in addition to the boost/vac hose on top. That means it will work on the lgt.
There's even a company that does this in Japan and sells the modified valves at ripoff prices: http://www.coto-sports.com
Anyway, I did this a couple of years ago, both on my oem bpv, and my dsm 1g bpv (metal!) that I modded to fit the lgt flange.
You'll likely see some mild compressor surge on moderate throttle shifts which isn't harmful, but it won't do a damn thing performance wise.
Theoretically your bpv will close faster on boost and keep it shut even at higher boost levels with the mod, but higher boost levels seem to play nice with the lgt bov.
In summary, not worth the time or effort unless you're bored and have nothing to do.