hey guys

i don't know if this is the right threat to post this but i am hoping it is

after a long wait i finally received my tunnel.

it has had a fare few holes drilled in the transom over the years but it still feels solid

i need to cut it down about 4" to suit the mid and i was wondering what is the best tool to cut it with while its still in the boat .
its built from plywood and is almost 3" thick

cheers
thunderstruck