cookiemz,
i also tempted regarding 4th gen but there are ALOT of nice carriers out there... a friend of mine recommended JETPACK, which has pretty good reviews too. Cham lah...
Yah, regarding the safety caution. I think better be safe than sorry, esp when I'm not a pro (yet!) when it comes to baby wearing. Furthermore, if Beco already acknowledge the carrier will be safer with the retrofit, then better do it right!
Linda,
I also quite bad when it comes to the sprees so can fight wif u. Hahahah now we crazy over bbleg!