list of stuff to buy before you start on this project with a high awesomeness level:
tools: a wire stripper
tape ( yes , tape is a tool)
hands ( don't lose 'em , they might just come in handy)
Step 1: Drilling
Drill a hole in a strong , robust part of the combustion chamber
Step 2: Wiring the Piezo ignitor
you will see 2 wires , extend them by attaching a longer wire , and secure with electrical tape.
make sure everything is sturdy and tape it all up
then , tape one wire to the small pin at the end of the sparkplug , and one wire to the o-ring around the threaded part
Step 3: Insert the spark plug and secure
then take steel wire , turn it around the sparkplug , then turn it around the whole gun and twist the wire , so that it's stuck , once again , look at the picture
Step 4: Testing
Btw , i'm from Belgium , so my English probably isn't perfect , so if there are any mistakes noticed by you , please alert me!!