On the off chance anyone out there is thinking about automating a roll off roof.....
Lidl have a 500W electric hoist on special at the moment.
www.lidl.ie/en/Offers.htm?action=showDetail&id=33045
Aldi had a similar one on special a couple of years ago. I'm using it to automate my roof. Its working quite well and I can use the observatory remotely.
I've made the software available here.
github.com/dokeeffe/indi-aldiroof
I need to add more instructions and docs to the github page but any questions just give me a shout.
  