Yes you need to see if the chrome is dented on the outer tube. (mine was)
Required some wiggling and down comes the inside baffles. It does matter where the holes are drilled because of spark arrest and just for looks. The upper baffle inside is the first baffle that restricts exhaust. So thats why you need to drop the baffle.
I ended up putting screws in all my drilled out baffles. And left only two quarter inch holes on the upper baffle open. The reason is because of the noise and do not want to give the cops a reason to pull me over. I'm trying to not have the "Outlaw" image in case I go to court one of these days to fight a citation for riding the MB. My argument is the electric bikes are considered bicycles with a 20MPH limit.
If you drill one inch from top of fat chrome tube that will let the pressure out of the top baffle. However, consider the direction of oil spittle? It will blow back on the engine and you!
Stick a large metal lever inside the pipe for added leverage to get the baffle out. It will flare the end of the exhaust outlet, may split the little outlet tube. Also consider running the bike up and down the block waiting for the baffle to work loose. Should be able to noitce the baffle working loose and hear the increased noise. I put M4 allen head screws, lockwasher, and nylock nut to seal the deal. Some say nylock will melt but I do not think it will. Just two dollars for allen screw kit from Lowes.