i am currently doing a conversion from a mk1.5 1.6 to a 2.0 rs, but have heard mixed reviews for either using a dv or a recirc, some say atmospheric dv are fine others say they cause running issues

what do you guys reckon ??

also on a note if anyone (which i presume loads of you have already) done this conversion how have you modified the driveshaft bearing carrier to avoid the turbo oil feed/return ??