i would love to ride your bike and feel the power characteristics. I only hear good thing about sleepers work. There was only one banshee i ever rode that had (imo) good usable power, that was lms's 10serval he did.
What type of fuel? The hp number is not the concern, its the whole usable hp that id highly doubt. I had a 4mil stock cylinder(385) that made 71hp, and there was zero usable power. It was either on or off.
If you grind the slots on the swing arm, where adjusters sit, it will give you more adjustment. Or just buy a half link. But yes, a round house is a great upgrade.
Your smoke ring should be about as thick as a quarter. When you do a wot plug chop your only reading the VERY BASE of the porcelain, nothing else. That is why people chop the threads so they can get a better visual of the base.
its hard to really see, but to me if you look at the BOTTOM of the porcelain it kinda looks like you have a good smoke ring. If it were me, id chop the threads off and report back before you do any tuning.