i'm in year 11 also and i agree it bloody stressful the grades im predicted are pritty good but im my early school life they where completly sh*t. my advise is to go in after school and do some extra work, yer i no it sounds geekish but it gets dark around 4 anyway you might as well use the time you would probably waste to good use.
My mate dame bought a 19" tyre for a 20" rim and it was a total waste of time, we spent ages trying to get it on and we failed, he then sent it back, take my advise dont try it.
I ripped the thread out of my Onza Muscleman crank when i was trying to fit a freewheel a few weeks ago, i ended up having to take it to a bike shop and had to pay 15 quid to get it put on. i don't want to have that problem again so i was thinking that i would buy an arm puller so that i can get my crank arm off when ever i want so basically i want to no what size i should get and where i can get it (websites).
Dame go his t-bird back, his mum and dad went down to the shop and had like a 3 hour argument with the guys in there before the police scanned it found his details on the chip and he got it back. pics coming soon.
Spray tar thats the most stupid i have ever heard of why not just get some out of the road, off a telegraph pole, from a building site its bloody eveywhere