I`ve been wanting to post this question for a while.
Basically, I want to cut disks from brass sheet, various diameters from very small to upto 3", possibly even 4" diameter. Don`t get me wrong, I can easily do this and I`ve done it many times. Hack off a square of sheet brass,, trim the corners, centre drill, mount on an arbour and turn to size. However, I can purchase brass disks at a price - much much higher than buying the sheet of course. These disks come perfectly round, to any size specified and more interestingly, no centre hole! The seller also is cutting these from sheet and will not want to waste money so I`m pretty sure they will not be cut from square. One method would be to cut a square of brass, glue or tape to a sacrificial wooden back plate and turn to size - risky but I know it can be done. However, I know this ISN`T the method being used since the brass still has its protective backing on both sides and you can see from the tare edges that it has been on during cutting.
So my question really is what methods would you guys suggest to allow me to cut brass disks from sheet with low material wastage? I can have a centre hole if necessary but I`m keen on thoughts as well for how else the seller can be cutting the disks mentioned above without the centre.
One inportant point is that we are talking about CZ120 leaded engravers/compo/hard brass - so can be machined very well, unlike cheaper normal "sticky brass" CZ108.

Chris