Seriously, SD product design need to have a good look at the requirements for modern guitars.
I'm not a fan of the odd-sized trembucker design which requires the specialist Seymour Duncan "Trembucker" mounting rings. To me they are an unacceptable inconvenience, and they are not really usable on guitars with pickguards.
SD should ideally change to producing humbuckers with moderm spacing on a new base plate design. Base the design on Dimarzio F spaced pole spacing and triangular mounting tabs. That is THE defacto standard for bridge pickups in modern guitars. Neck pickups can be slightly narrower such as 50mm or ideally about 1.5 ~ 2mm narrower than the bridge pickup. Trembuckers should be EOL and phased out completely.
While you are doing it, please supply phillips head mounting screws, that are a lot faster and easier to install. Also less risk of scatching the guitar body than the old flat blade screw types.
/rant.