Kevin M Cuddeback

Can an ATT/GSM 4S motherboard be swapped into a "hollowed out" Verizon/Sprint 4S Worldphone?

So has anyone actually done the GSM<->CDMA motherboard swap proposed above as possible on a 4S? I too have a good GSM/ATT/ mobo (working on Tmo) trapped in a beat up iphone 4s (cracked screen, bad microphone). It seems very tempting to swap this into a cheap Sprint 4S (removing only the sprint motherboard).