[BenjiWiebe]

The actual view has little to do with the build of the telescope, and lots to do with whatever optics you put in it.

The mechanical part can influence the view via "tube currents" (air flowing in the optical path due to heat convection) or by not allowing good heat flow to and from the mirror so it stabilizes quickly.

There's a few more things to consider, but remember it's mostly the optics.

[tim-fan]

Doesn't the mechanical part need to position the optics with a fair amount of precision to get a good view? Id imagine very slight movements or misadjustments could cause issues.

I don't know much about telescopes :p

[chantepierre]

You need smooth movement on altitude and azimuth axes, then the telescope must be still and vibration-free to enjoy the view. The other constraint is structural integrity to maintain alignment of the optics. Those two things are the basis of all builds (except for optics!).