In my case, Form 4, the build platform flex holds a lot of resin when print finishes, even after removing the parts it usually drips. If you leave the platform inside the printer, next day you still have small drops under the platform that can drop when removing the tank.
Basic idea is to use an accessory that holds the platform tilted inside the printer so that the resin can drip through one of the corners. This accessory can be a part printed in FUSE 1 that connects in one side to the build platform (similar to the table support printed on FUSE1 in the photo), the other side to the printer slot so that the platform can rest tilted inside the printer and drip all the resin. Good to use after printing and before washing parts and also when printer is turned off.
The idea is not new, there are several posts for previous printer models, Form 2 and Form 3.
Someone with a 3D scanner to capture detailed measures? Or Formlabs to share some drawings to build the accessory?
Not sure if it works but I would add a small vibration motor inside the part to speed up resin drain. Maybe with speed control to adjusts correct vibration resonant frequency depending of resin viscosity, say from 10Hz to 100Hz would do the work, and with a small usb-c rechargeable battery inside. Hoping to be safe for the mechanical components of the printer.
Hello!
Here are the STL and STEP files for the mount shown in the photo above. That should get you to a good starting point to design a tilted mount. Please keep us updated if you design something that works well for you 
Printable parts for Formlabs devices
As far as the vibrations to remove excess resin, I wouldn’t recommend it. It will damage your dovetail assembly. Also, there are many user replaceable components where we have omitted thread locker so that it’s easier to replace, so the vibrations will likely loosen those screws over time and cause issues.