Netsys Heating Pipe Sizing - Emitter Questions

Hi this is Riya from Inox Steel India.

I haven't used Hevacomp in a long time, so please excuse any trivial questions.

I'm attempting to model a relatively large project, and I've already placed all of my emitters (some ceiling void, some floor level).

When I try to connect the emitters using separate flow and return pipework, it appears that the emitters are not connecting. Zooming in reveals that the grid does not always appear to line up with the connection point of the emitters, as I've modelled some of them at 45 degrees (see figure below). I've tried checking this in the isometric view, but due to the large building, it is difficult to check. Is it acceptable to model the emitters at 45 degrees? Is there one?