The needles are now objects, so you don't need them on the gauge
Oh, that's good. No need to make 3D needles, this saves a lot of time
Yes this program is very handy for creating easy shapes. I think it's a lot faster to do for the whole details, like switches, dials, rotaries, MFD's etc. You start with a simple object like a cube or a cylinder and then you can adjust it, but in another way you would do it with an 3D modeller.
You directly indicate the dimensions to the object. Holes and notches are done with simply adding another object to the previous one and subtract it (you can switch every object to a negative). After that you can merge them together to a single part.
There is a bunch of primed objects available, which you could also adjust for your needs. You always start with "simple shapes" but there are also more advaced shapes made by other users, or you can do one by yourself if you like. You have to get used with it at the beginning, cause it works other than normal CAD programs, but after some practice it's really handy.