Get a big plastic dead blow (hammer) and learn how to mount tires without tire irons.
next time you do a tire/tyre change have someone video and post it up. would love to learn this technique.
me too, im not a fan of changing tyres.
I used to use screwdrivers too when i was young, you only pinch so many tubes before ya realise its not working out 
Thats the thing though it didn't PINCH the tube, it litterally went right through it. In hindsite if the tube was that weak, it was due for replacement anyway. I do hate changing tires though. Especially back ones, I don't mind the front ones. Anyway now shes got a set of brand new Bridgestones on her. M203/4 combo and thus far work extremely well.
As for the bike itself, I'm astounded at how quickly it climbs through the 13 grand rev range. Its rediculous I've hit the rev limiter a couple of times now. I can't hold a gear and it doesn't sound like its revving very high. Anyway thus far I've only ridden it on straights and its power band was VERY impressive in terms of how forgiving it was. In a 125 only competition falling off the pipe wouldn't be a big deal at all. I haven't yet checked the gearing though I think it might be a bit short judging by how quickly it climbs through the rev range. I'll probably put a 51 on the rear when this one wears out (Wont be long at all).
As for the mikuni carby? Crap. Really crap. Annoying to work on, floods the bike really easily (although thats probably jetting related) and compared to the keihin on my YZ doesn't do its job too well.
And while I'm on the topic, what do people have to say about the Mikuni on the Husqy CR125?
