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Hadn’t considered the need for a whacked plate.
The whole point of type 1 is to compact it to form a flat, solid base. This can be done by hand but it will be pretty back breaking and no where near as effective. If you get your type one laid down and evenly raked out you should shouldn't need the whacker plate for more than an afternoon, you'll need to whack it down then assess for low spots fill in the low spots and re whack the whole thing.
Bobbo
Was planning on digging to 150mm, laying 100mm of type 1 then cementing the slabs down to level.
Quick calcs suggests that’s around 3tonnes of stuff out of the ground before putting stuff back in.
Hadn’t considered the need for a whacker plate.