I thank you all for your postive and constructive feedback.
@Chris:
The NK900 is a imaging optimized Newton telescope, build by myself. It consists of a carbon tube, Orion UK Ultra Grade main (f4.5/900mm) and secondary mirror, a Moonlite focuser and is highly adjustable to perfectly fit different coma correctors (640mm - 1030mm; f3.5 - 5.2). After struggling around the last years with cheap asian products , I decided to build my own newton to satisfy my needs.
