Let’s take into consideration the gopro and its plastic housing weigh around 12 oz. depending on the distance you want the camera to move will depend on the weight capability of the line. 35 to 50 works best if it’s smooth line and not braided, but braided will work.
The pole we will be using must have its laminate still intact on its retaining rings and preferably still straight. The size doesn’t matter and can change according to your project. For example the smaller the shaft that follows the line the faster it will move and the longer the shaft will result in a smooth as warm butter glide.
Counter balances are not really justified for this project as we are trying to reduce the weight of the whole overall package we will be sending down the line. The weight of the camera will supplement just fine.
A proper way to fasten the line that will be traveled is needed in order to move from angle to angle without having to use 1000 yards of line for 2 camera shots. The use of D and O rings will be implemented along with other preventative maintenance precautions for the camera which will be traveling at higher speeds due to the angles used.
I have tinkered with adding a remote horizontal control but have found the line is too thin. A pulley system will work well and is easily adapted to the design.
What you will need :
GoPro and its Housing
Bolts matching the housing to the GoPro
Rail mount for a pellet rifle scope
Fishing Pole Rod
D & O Rings