Hi,
if you need all data sources at R/3 Qua. i.e all the data sources need to moved to R/3 Qua. So why can't handle thru transports. About copy may won't work because source system technical names(R/3 Dev and Qua) will be differ. Agan you need to maintain logical mappings(R/3 Qua to Bw dev).
Thanks