Cosplay and anime is good! It can teach you creativity and things that maths and french can't!
I think you shared the same brainwave as me with the Justaways! I was planning on making a justaway, but then thoughts of "where do i put my money" and stuff overwhelmed me... and it was then, when i decided to make: the Justaflask... you could put your belongs inside or just some tea. Note: this probably won't come into existence as i will find a solution for the bag problem.
As for your Justtank i can imagine it would cause quite a few problems. I think the Neo Armstrong Jet Cyclone Cannon would cause the most! Especially with transportation... XD. Plus i don't know why, but i love halcyon goggles! They just look so cooolll, you could probably find some cheap ones on eBay!
And Unfortunately i seem to be stuck on episode 100 ~ This is mostly due to my nightmare internet! I normally torrent a bunch of episodes so i have them HQ, and i have up to 100, but because my internet hates me, my torrenting speed is a measly 2.0 kB/s... So i decided to try streaming episodes- but it takes ages to load!!! And when it finally does, half-way through watching it will stop and say its the end! How annoying...
As for the Midlands Expo, i doubt i will be able to go, mostly due to the distance and the fact my parents most likely won't allow it. But i shall try and convince!