I can hardly comprehend that a brand so highly regarded would come up with such an inelegant solution to a problem that doesn't exist. This is the kind of thing I'd expect from basschat's favourite guitar improver. What next? foderas with the tuners set at jaunty angles and the bridge hanging off the ar$e end of the body.
I have a pair of JMJ signature mustangs which are absolutely excellent in every way. It would be good to get my hands on Mr Meldal-Johnsen's original '67 the signatures are based on.
You can fit a set of Gotoh res-o-lite GB640 to your Vintera 60s Jazz.
These should fit without needing to redrill and they will be lighter than the stock tuners. They won't turn the wrong way like the stock tuners do unless you mistakenly order the GB640R (reverse) version. They should cost a few quid over £100. I bought my sets from tonetech.