Firstly - let me apologise. Some months ago the forum was incredibly helpful in helping me choose a lift for a house I was buying with a 7.5x7.5m garage with a low roof. Sadly that house purchase fell through - that was the fourth time a vendor had changed their mind at the last second and decided to stay. So there is a big overlap between this question and the last, but it is a different application - so I do appreciate your patience.   The silver lining of the sale's collapse is that