Well as visible from the image to the right I chose to tear down the old observatory and build a new one from scratch.
As the previous modification from a commercial cabin to roll-off went well I decided to go that route again for the new observatory. However as I found out later in the modification process, there were some bigger challenges this time when converting to the roll-off design, which were primarily caused by the design of the new cabin.
I decided to go for a commercial cabin which was just a bit longer in order to get some more room available for a warm-room without it compromising my view of the sky. In order to fit this slightly bigger cabin I had to modify the foundation and in doing that I also decided to bring it a bit forward to have easier access to the back of the cabin for painting and maintenance.
Besides building a new cabin I also decided to use the old cabin as a separate storage space underneath the roll-off beams, so I took all the best parts from the old cabin and modified it into a new storage cabin.