eternit thrutone

[andyt46]

Hello everyone, i have just joined this site and i am in need of some help. I have just built a shed and decided to try my hand at installing thrutone nt slates i was told it was easy but i just cant get my head around it. The roof is gabled both ends with a pitch of 30deg, length 3.3m with a 1.5 drop either side. The merchants have supplied me with 165 600x300 and 12 600x600 and i just dont know where to start, i always thought you start off with a half tile that hangs 50mm over the gutter then a 600x300 totally covering it but i dont know how to achieve this with the materials i have got and also sorting out the verge tiles can anyone please help me on this

[bd3cc]

600x600 are tile and a half, every other course at the gable.