Right thats sorted then.
I am quite looking forward to getting it sorted tomorrow.
Think I will suss out the two easy ones first.
An A4 board covered both sides for IR. (Because thats the one I will be using)
An A5 with 40mm web strap covered both sides so it sticks to your trousers so the strap won't have to cut your blood off to keep it in one place.
Any ideas how many of them I should make? I will see how much it is to setup the flow jet I have a suspiscion that once it's ready to go each one will be buttons on top of the metal.
I can't see them being more than 25 quid for the A4 board and 30quid for the A5.