Yeah twas the slag, twas only a little slide but can't really do too much in the day, the other people that may be working might get a bit annoyed.
Got an nc30.
Thats the little toy. It not that fast in a straight line (estimate 130ish) but things struggle in the twisties, it eats corners better than most things I've ever driven\ridden. Needs a new tyre now tho :(
I love anything fast, altho last night there were a few corners that I think I probably should have slowed down a lot more than I did. Scraped my foot on the floor a few times, was good fun tho, real twisty roads.
Right the exhaust. The threads you are on about are studs in the downpipe itself. if you can get the back part of the exhaust off you can use stud extractors to get the studs out or the age old method of 2 nuts clamped together on the stud. it can take a bit of effort but will usually go. From what I remember the studs don't cost too much but can check up on that for ya anyway. You really don't want to be cutting them off tho if you can help it.
Actually I think I have a loose manifold in a scrap bin so might be able to take a pic tonight so you can see what I mean easier.
Thats bad news about the other bolt, really don't want the head threaded, if its causing no problems and not blowing leave it for now, get to it when you have battled through a few more jobs.
If you have the original connector for that oil pressure sensor yeah go ahead and reuse it, a nice new bit of wire soldered in place attached to either end of the snapped bit should do nicely, I'd get some heatshrink on it as well.
What CC is yours, I love the wheels on those bikes..look sweet 
ops: ) 
& soon had to reduce my speed to about 60! Knew they were working well then!! lol
