Firstly, I am totally new to Observatory, but love it! I had developed something myself using FileMaker for saving observing sessions and images but having something which is a one stop shop and includes stacking and overlays is absolutely fantastic! Regarding my question, I did check the forum and discovered that one way of overcoming plate solving errors (it's mostly on those images where a nebula or globular cluster covers most of the image) was to upload the image to astronomy.net and get the solved FITS image and to obtain the WCS data. I did this successfully and the image now has a pin icon, confirming its position has been registered within Observatory. However, the overlays, including the grid, do not appear if I turn them on. I imported the WCS file as an attachment to the FITS image, but perhaps this is not how it's done.