No problems Janos
You will find the Alt. tension problem can be fixed by putting a keychain ring of suitable strength on the end of the tension spring & attaching that to the attachment point on the base.
A cheap dewshield for the finderscope can be made with a section of postal roll, painted black with adhesive velcro dots inside to give a firm fit.
Lots of good info under Equipment discussions: What mods have you made.