I believe I will need to make the handle in two halves to allow access for placing the speaker, batteries, switch, wires etc.
You could possibly cut it in half yourself and hollow it out but I would need it for hyperdyne to do the installation probably.
As for payment. As soon as possible would be great. Based on past experience I am sure he will start the run with half of the total for all 18 pieces paid upfront but I won't be able to pick up the blasters until the total balance is paid for.