As you may see there is a certain amount of "play" in the screw, not helped by the fact that you canna get to the head:
A view from above showing exactly why putting the screw in is hard! Anyhow application of a certain amount of brainpower and spare wood suggested that if I lift the base then I can put the screw in with a ratchet thingummy. Hey presto:
... and the screws are in, eight of them each around 80mm long - that greenhouse is going nowhere, no Wizard of Oz happening in our back garden:
Also the comment yesterday about the slab area being too small meant there was some 60-70mm of "negative ease" resolved here by filling the gap with sand to avoid drafts:
Anyhow, job done, time to install growbags & tomato plants:
We decided to "hang" the tomato plants rather than staking them, using a bowline knot one or two branches up the plant then connected to a sky hook (in this case a horizontal line across the greenhouse):
The idea being that the plant will wind around the string which will support it, shown below. Anyhow, 6 tomato plants went in, 3 "chadwick" and 3 "garden pearl." Room left for a couple more tomatoes and the chilli plants behind:
Not a moment too soon, or maybe several moments too late, as some of these already have fruit on. Job done, will see how these get on.