This is a printed power feed based on a LS400 Front Right (Passenger) window lift motor, P/N 8572050060 (~$15 when I purchased mine) with a generic ‘10-55V DC Motor controller’ (https://www.ebay.com/itm/124828416816). It works with the Sieg X2 model mills, and probably not with the X2D (LMS, with the larger travel and bed). It expects the end of the X axis leadscrew (with slot) to be about 40mm from the left end of the table, and the longer table on the X2D has a full-length leadscrew from what I understand.
The two thickest wires on the motor (red and green on mine) are the drive wires that get connected to the controller. I can't figure out what the other three (Black, Yellow, Blue on mine) are for. If anyone knows, please pass it on.
It requires a M5x16 socket head cap screw for the motor pivot, a M5x45 SHCS for the lever pivot, and a M5x10 SHCS for the stop ‘pin’, in the 3 holes of the motor mount. These need thread locker, since they aren't all torqued down - ideally, there would be custom shoulder bolts in the two pivots.
The controller attaches to the shield (SwarfShield_Front.stl, SwarfShield_Top.stl) with 3x M3x8 button head cap screws, and the shield attaches to the motor mount with 3x M3x6 BHCS.
It also requires some M3 heat set inserts and 3x M3x16 SHCS (with washers) for attaching the power feed unit to the power feed mount. It uses the original M6 mounting hardware to attach the mounting block to the table.
There is a 608 bearing that is inserted into the body of the power feed that the output shaft runs on.
The MotorMount.stl needs a support enforcer under the large round area for the main gear.
BOM
The author hasn't provided the model origin yet.