To be honest, I don't want to push it too hard as I don't think the saw was designed for super horsepower and eventually, something will become a weak link.
I noticed on a couple of seized 029 jugs I had that the seizure occurred in the same spot - where the boss was for the muffler bolt on the side closest to the chain. It didn't take me long to figure out why.
The manufacturing process created an air flow problem in that spot. It also allowed the heat from the muffler to expand the mounting boss to expand into the cylinder. So you ended up with a situation of reduced clearance and excessive heat in that spot.
On my AM 390 jug I drilled out the boss and opened it up with a Dremel bit so the air could flow through and the heat wouldn't expand the extra metal in that area. I also ground out any areas that would block the air flow to the front of the jug. I was looking for a more uniform expansion of the jug with good air flow. Even though I've bumped up the power, I've had not had any problems.
I should have mentioned this before - you have to take the jug off to do that mod. Oh well, these open port jugs tend to wear a groove in the rings that drops compression. The next time you change the rings you might want to do the mod.