[Wavytone]

I only fit the insulation when assembling the scope.

Moisture attracts mould so it better when packed away to have the scope bare and in something that breathes (canvas).

On the SW I thought the focusser is fine. It’s possible to add a Crayford but frankly I never saw any point in it.

Fitting a Crayford requires more backfocal length. The result is that more light is cut off by the diameter of the hole at the back of the scope (can’t change that !) so you end up with slightly more vignetting.

Another thing to understand is how much magnification you’re working with in these scopes, and being f/15 the focal plane isn’t so sharply defined as it is in say f/5 scopes. Those coming from fast newtonians or refractors will take a while to get used to this.

Conversely put a big 2” 40mm eyepiece in and sure the focus will snap just as it does in a dobsonian. But bear in mind most users of small dobs probably don’t go past 120 or 150X most of the time. With your scope, the fun really starts at 200X.