As those of you who own a WE 1911 or have been following the issue surrounding their overly-long recoil spring guide (which ended up slamming the tip of the recoil spring plug and breaking the bushing, instead of impact the dust cover the way it's supposed to), it has been necessary to shave off ~1 mm from the spring guide to prevent damage to the gun.
Upon inspecting my new WE MEU(SOC) .45 (USMC's 1911), it appears the WE has finally revised their spring guide (in their MEU anyway, don't know about their other 1911s yet, but it's probably safe to presume newer ones will also include the fixed spring guide).
The new spring guide is 47.2mm in length overall, versus the original 48.3mm on older guns. I measured one of my modified spring guides (which I consider had been adequately shortened) and came out to 47.6mm. So it appears the new spring guide is satisfactorily safe to use unmodified.
Side-by-side comparison of the old and new spring guides
The new, modified (by me), and original spring guides