If using a PyroMate (or similar centronics connector type) firing system.... Don't make the mistake of laying out the multicore cables out starting at the field modules end or you may find out like I did with 5 min to go before firing that you have the wrong gender of connector at the firing box end !!! Frantically swap round all the multicore cables whilst cursing in fluent Anglo Saxon
Start at the firing panel end first & this won't happen.
Tube cleaner: cut down road fence pin with the pointy end bent over like a hook.
Love the bit about the arrow by the way.
ChrisB