Truss company has said I will get a delivery day and time and yes I can only hope on the weatherI think you need to be a little more realistic on what's involved and how long things will take.
You probably can't control the delivery day, so what if it's raining on that day, and the days after. I think a random heavy shower day is often worse than it just raining all day as it's all stop start, cover uncover.
And "what ifs" play a big part in the plan going to plan or not. At the moment everything is planned around everything being perfect, and even then it's really optimistic to expect this to be done in three days.
The chippys do this all the time it’s there main job and they recon it’s doable to get them up in a day everything else will take time yes and if the ceilings get destroyed I’m not too bothered