Hi,Ron

Yes,you are right.at present,most manufacturers like our company prefer the rs274x
format to build the pcb.The reason is the rs274x is easy to read and no risk.Hence,
if you have any pcb to make,we prefer you can change the format into rs274x so
as for us to read easily.

Best regards,

George Liu
Pecore Electronics
Mail:[email protected]
Http://www.pelcore.com