Ok, I have a jug I've been playing with a bit, it's basically sacrificial but useable with a clean bore/piston. I've cleaned up & knife edged the intake side & opened & raised the exhaust. This setup has worked well for me in the past. Anyway, I wanted to experiment with adding Boyeson ports to the intake, I've got them through and into the transfer port but I've also added a small port straight through beside the main intake ports. It's small but again, experimental. Anyone suppose It'll hurt anything?