SmallRig Universal 15mm Rail Support System Baseplate 2092B could offer lots of additional attachment options and enables the camera to release its potential to the utmost as per the needs of the cameraman during shooting.
It locks the QR plate via a locking lever for quick release and attachment. The Arca QR plate on the top could be mounted with the camera, and it features convenient detachment and it is very easy to switch to handheld shooting. It could attach 15mm Rod 1053 for follow focus, matte box and Long Lens Support with Dual 15mm Rod Clamp 1087 based on your needs.
Its adjustable height could reach up to 24mm in maximum via a wingnut, thus it ensures 85mm rod height. The height from the QR plate to rod center ranges from 33.6mm to 57.6mm. Wingnut at the side enables enough space for adjustment manually.
It is equipped with 1/4"-20 and 3/8"-16 threaded holes at the bottom for DIY operation. Therefore, it could attach Quick Dovetail (Manfrotto) 1280 and then sit on Manfrotto tripod.