Sharksie
(Sharksie)
1
Link to plugin: http://www.roblox.com/Object-Property-Setter-item?id=184310321
Got tired of writing the command every single time I wanted to set an object property so I just made a plugin for it.
- Select the object you want to change
- Click on the name of the property in the gui (make sure you’ve enabled it by clicking the button)
- Click on the object in the explorer that you want to set it to, there are also Set To Nil and Cancel buttons.
- Tada! Your object property is set.
Also click the button to toggle it enabled and disabled, and remember it saves your setting.

Davidii
(Davidii)
2
This should really be official.
In addition, there should be a 3D widget to set C0 and C1.
digpoe
(digpoe)
3
Looks like we had similar ideas.
By the looks of it, your GUI is better than mine. 
It would be nice if someone were to make a plugin which would work for all of these types of instances.
Sharksie
(Sharksie)
4
By all these instances do you mean all object properties? My plugin supports every accessible object property. PrimaryPart, Part1, CameraSubject, etc…