Adjusting the SkyWatcher MakNewton MN190 is as easy as adjusting a Newton.

Product Description
Adjusting the SkyWatcher MakNewton MN190 is just as easy as with a Newtonian telescope.

The focuser can also be adjusted using push-pull screws. The secondary mirror can be rotated and tilted using the usual three adjustment screws. The primary mirror can also be adjusted using push-pull screws on the mirror cell.

http://www.teleskop-spezialisten.de/shop/Maksutov-Cassegrain-MAK/ab-180mm/Skywatcher-Explorer-190MN-DS-Pro-190mm-f-5-3-Maksutov-Newton-Teleskop-FLAT-FIELD::317.html